Ok, So we reran everything and got the same error message again, now i'm able to reproduce it.

2006-03-28 12:05:18.638 CESTERROR: XX001: invalid page header in block 39248 of relation "dunn_main"
2006-03-28 12:05:18.638 CESTLOCATION:  ReadBuffer, bufmgr.c:257
2006-03-28 12:05:18.638 CESTSTATEMENT:  VACUUM;

 The output of the block in question is as follows:

* File: /backup/pgsql/data/base/16384/934173
* Options used: -R 39248 -f
*
* Dump created on: Tue Mar 28 13:43:09 2006
*******************************************************************

Block 39248 ********************************************************
<Header> -----
 Block Offset: 0x132a0000         Offsets: Lower     536 (0x0218)
 Block: Size 8192  Version    2            Upper    4796 (0x12bc)
 LSN:  logid     26 recoff 0xa9cad42c      Special  8176 (0x1ff0)
 Items:  129                   Free Space: 4260
 Length (including item array): 540

 Error: Invalid header information.

  0000: 1a000000 2cd4caa9 01000000 1802bc12  ....,...........
  0010: f01f0220 d49f3800 b49f4000 949f4000  ... [EMAIL PROTECTED]@.
  0020: 749f4000 5c9f3000 449f3000 2c9f3000  [EMAIL PROTECTED],.0.
  0030: 149f3000 fc9e3000 e49e3000 cc9e3000  ..0...0...0...0.
  0040: b49e3000 9c9e3000 849e3000 6c9e3000  ..0...0...0.l.0.
  0050: 549e3000 3c9e3000 249e3000 0c9e3000  T.0.<.0.$.0...0.
  0060: f49d3000 dc9d3000 c49d3000 ac9d3000  ..0...0...0...0.
  0070: 949d3000 7c9d3000 649d3000 4c9d3000  ..0.|.0.d.0.L.0.
  0080: 289d4800 049d4800 e49c4000 c89c3800  ([EMAIL PROTECTED]
  0090: a89c4000 909c3000 6c9c4800 549c3000  [EMAIL PROTECTED]
  00a0: ec923800 389c3800 1c9c3800 fc9b4000  [EMAIL PROTECTED]
  00b0: dc9b4000 bc9b4000 9c9b4000 7c9b4000  [EMAIL PROTECTED]@[EMAIL 
PROTECTED]|[EMAIL PROTECTED]
  00c0: 5c9b4000 3c9b4000 1c9b4000 009b3800  [EMAIL PROTECTED]<[EMAIL 
PROTECTED]@...8.
  00d0: e89a3000 d09a3000 b89a3000 a09a3000  ..0...0...0...0.
  00e0: 849a3800 689a3800 509a3000 2c9a4800  ..8.h.8.P.0.,.H.
  00f0: 0c9a4000 bc923000 d4923000 08933000  [EMAIL PROTECTED]
  0100: f4993000 dc993000 c4993000 ac993000  ..0...0...0...0.
  0110: 94993000 7c993000 64993000 4c993000  ..0.|.0.d.0.L.0.
  0120: 34993000 1c993000 04993000 ec983000  4.0...0...0...0.
  0130: d4983000 bc983000 a4983000 8c983000  ..0...0...0...0.
  0140: 74983000 5c983000 44983000 2c983000  t.0.\.0.D.0.,.0.
  0150: 14983000 fc973000 e4973000 cc973000  ..0...0...0...0.
  0160: b4973000 9c973000 84973000 6c973000  ..0...0...0.l.0.
  0170: 54973000 3c973000 24973000 0c973000  T.0.<.0.$.0...0.
  0180: f4963000 dc963000 c4963000 ac963000  ..0...0...0...0.
  0190: 94963000 7c963000 64963000 4c963000  ..0.|.0.d.0.L.0.
  01a0: 34963000 1c963000 04963000 ec953000  4.0...0...0...0.
  01b0: d4953000 bc953000 a4953000 8c953000  ..0...0...0...0.
  01c0: 74953000 5c953000 44953000 2c953000  t.0.\.0.D.0.,.0.
  01d0: 14953000 fc943000 e4943000 cc943000  ..0...0...0...0.
  01e0: b4943000 9c943000 80943800 64943800  ..0...0...8.d.8.
  01f0: 48943800 2c943800 10943800 f4933800  H.8.,.8...8...8.
  0200: cc935000 a8934800 80935000 58935000  ..P...H...P.X.P.
  0210: 3c933800 20933800 20933800           <.8. .8. .8.

<Data> ------
 Item   1 -- Length:   28  Offset: 8148 (0x1fd4)  Flags: USED
  1fd4: 00000f45 20001c40 13000000 62727574  ...E [EMAIL PROTECTED]
  1fe4: 6f2d7569 746b6572 696e6700           o-uitkering.

 Item   2 -- Length:   32  Offset: 8116 (0x1fb4)  Flags: USED
  1fb4: 0000dd92 32002040 16000000 62727574  ....2. @....brut
  1fc4: 6f2d6d61 616e6473 616c6172 69730000  o-maandsalaris..

 Item   3 -- Length:   32  Offset: 8084 (0x1f94)  Flags: USED
  1f94: 00008e29 15002040 18000000 62727574  ...).. @....brut
  1fa4: 6f6d6161 6e647361 6c617269 7373656e  omaandsalarissen

 Item   4 -- Length:   32  Offset: 8052 (0x1f74)  Flags: USED
  1f74: 0000af3a 32002040 18000000 62727574  ...:2. @....brut
  1f84: 6f6d6161 6e647361 6c617269 7373656e  omaandsalarissen

 Item   5 -- Length:   24  Offset: 8028 (0x1f5c)  Flags: USED
  1f5c: 0000a70c 14001840 0e000000 62727574  [EMAIL PROTECTED]
  1f6c: 6f6d6172 67650000                    omarge..

 Item   6 -- Length:   24  Offset: 8004 (0x1f44)  Flags: USED
  1f44: 00003b0d 3d001840 0e000000 62727574  ..;[EMAIL PROTECTED]
  1f54: 6f6d6172 67650000                    omarge..

 Item   7 -- Length:   24  Offset: 7980 (0x1f2c)  Flags: USED
  1f2c: 00007618 19001840 0e000000 62727574  [EMAIL PROTECTED]
  1f3c: 6f6d6172 67650000                    omarge..

 Item   8 -- Length:   24  Offset: 7956 (0x1f14)  Flags: USED
  1f14: 0000af19 25001840 0e000000 62727574  [EMAIL PROTECTED]
  1f24: 6f6d6172 67650000                    omarge..

 Item   9 -- Length:   24  Offset: 7932 (0x1efc)  Flags: USED
  1efc: 00007c1e 0e001840 0e000000 62727574  ..|[EMAIL PROTECTED]
  1f0c: 6f6d6172 67650000                    omarge..

 Item  10 -- Length:   24  Offset: 7908 (0x1ee4)  Flags: USED
  1ee4: 00001420 11001840 0e000000 62727574  ... [EMAIL PROTECTED]
  1ef4: 6f6d6172 67650000                    omarge..

 Item  11 -- Length:   24  Offset: 7884 (0x1ecc)  Flags: USED
  1ecc: 00007528 2a001840 0e000000 62727574  ..u([EMAIL PROTECTED]
  1edc: 6f6d6172 67650000                    omarge..

 Item  12 -- Length:   24  Offset: 7860 (0x1eb4)  Flags: USED
  1eb4: 0000c231 1f001840 0e000000 62727574  [EMAIL PROTECTED]
  1ec4: 6f6d6172 67650000                    omarge..

 Item  13 -- Length:   24  Offset: 7836 (0x1e9c)  Flags: USED
  1e9c: 00008240 21001840 0e000000 62727574  [EMAIL PROTECTED]@....brut
  1eac: 6f6d6172 67650000                    omarge..

 Item  14 -- Length:   24  Offset: 7812 (0x1e84)  Flags: USED
  1e84: 0000f45e 39001840 0e000000 62727574  [EMAIL PROTECTED]
  1e94: 6f6d6172 67650000                    omarge..

 Item  15 -- Length:   24  Offset: 7788 (0x1e6c)  Flags: USED
  1e6c: 00009362 24001840 0e000000 62727574  [EMAIL PROTECTED]
  1e7c: 6f6d6172 67650000                    omarge..

 Item  16 -- Length:   24  Offset: 7764 (0x1e54)  Flags: USED
  1e54: 0000b666 3d001840 0e000000 62727574  [EMAIL PROTECTED]
  1e64: 6f6d6172 67650000                    omarge..

 Item  17 -- Length:   24  Offset: 7740 (0x1e3c)  Flags: USED
  1e3c: 0000b76b 1b001840 0e000000 62727574  [EMAIL PROTECTED]
  1e4c: 6f6d6172 67650000                    omarge..

 Item  18 -- Length:   24  Offset: 7716 (0x1e24)  Flags: USED
  1e24: 00005d71 07001840 0e000000 62727574  [EMAIL PROTECTED]
  1e34: 6f6d6172 67650000                    omarge..

 Item  19 -- Length:   24  Offset: 7692 (0x1e0c)  Flags: USED
  1e0c: 00009571 0b001840 0e000000 62727574  [EMAIL PROTECTED]
  1e1c: 6f6d6172 67650000                    omarge..

 Item  20 -- Length:   24  Offset: 7668 (0x1df4)  Flags: USED
  1df4: 0000ca89 20001840 0e000000 62727574  .... [EMAIL PROTECTED]
  1e04: 6f6d6172 67650000                    omarge..

 Item  21 -- Length:   24  Offset: 7644 (0x1ddc)  Flags: USED
  1ddc: 0000608b 0d001840 0e000000 62727574  [EMAIL PROTECTED]
  1dec: 6f6d6172 67650000                    omarge..

 Item  22 -- Length:   24  Offset: 7620 (0x1dc4)  Flags: USED
  1dc4: 0000f78c 1f001840 0e000000 62727574  [EMAIL PROTECTED]
  1dd4: 6f6d6172 67650000                    omarge..

 Item  23 -- Length:   24  Offset: 7596 (0x1dac)  Flags: USED
  1dac: 000065b0 16001840 0e000000 62727574  [EMAIL PROTECTED]
  1dbc: 6f6d6172 67650000                    omarge..

 Item  24 -- Length:   24  Offset: 7572 (0x1d94)  Flags: USED
  1d94: 00004ab1 22001840 0e000000 62727574  ..J."[EMAIL PROTECTED]
  1da4: 6f6d6172 67650000                    omarge..

 Item  25 -- Length:   24  Offset: 7548 (0x1d7c)  Flags: USED
  1d7c: 00008d62 0f001840 0f000000 62727574  [EMAIL PROTECTED]
  1d8c: 6f6d6172 67653b00                    omarge;.

 Item  26 -- Length:   24  Offset: 7524 (0x1d64)  Flags: USED
  1d64: 00001620 22001840 0f000000 62727574  ... "[EMAIL PROTECTED]
  1d74: 6f6d6172 67657300                    omarges.

 Item  27 -- Length:   24  Offset: 7500 (0x1d4c)  Flags: USED
  1d4c: 00001b69 1f001840 10000000 62727574  [EMAIL PROTECTED]
  1d5c: 6f6d696e 696d756d                    ominimum

 Item  28 -- Length:   36  Offset: 7464 (0x1d28)  Flags: USED
  1d28: 00008d35 2c002440 1a000000 62727574  ...5,[EMAIL PROTECTED]
  1d38: 6f6d696e 696d756d 6a657567 646c6f6e  ominimumjeugdlon
  1d48: 656e0000                             en..

 Item  29 -- Length:   36  Offset: 7428 (0x1d04)  Flags: USED
  1d04: 00001e75 3b002440 1a000000 62727574  ...u;[EMAIL PROTECTED]
  1d14: 6f6d696e 696d756d 6a657567 646c6f6e  ominimumjeugdlon
  1d24: 656e0000                             en..

 Item  30 -- Length:   32  Offset: 7396 (0x1ce4)  Flags: USED
  1ce4: 00009974 39002040 16000000 62727574  ...t9. @....brut
  1cf4: 6f2d6d69 6e696d75 6d6c6f6e 656e0000  o-minimumlonen..

 Item  31 -- Length:   28  Offset: 7368 (0x1cc8)  Flags: USED
  1cc8: 0000181f 3f001c40 14000000 62727574  [EMAIL PROTECTED]
  1cd8: 6f6d696e 696d756d 6c6f6f6e           ominimumloon

 Item  32 -- Length:   32  Offset: 7336 (0x1ca8)  Flags: USED
  1ca8: 0000b220 1c002040 15000000 62727574  ... .. @....brut
  1cb8: 6f2d6d69 6e696d75 6d6c6f6f 6e000000  o-minimumloon...

 Item  33 -- Length:   24  Offset: 7312 (0x1c90)  Flags: USED
  1c90: 00002283 32001840 0f000000 62727574  .."[EMAIL PROTECTED]
  1ca0: 6f2d6e65 74746f00                    o-netto.

 Item  34 -- Length:   36  Offset: 7276 (0x1c6c)  Flags: USED
  1c6c: 0000e39f 01002440 1b000000 62727574  [EMAIL PROTECTED]
  1c7c: 6f2d6e65 74746f72 656b656e 6d616368  o-nettorekenmach
  1c8c: 696e6500                             ine.

 Item  35 -- Length:   24  Offset: 7252 (0x1c54)  Flags: USED
  1c54: 0000a81c 3c001840 0f000000 62727574  ....<[EMAIL PROTECTED]
  1c64: 6f2d6f6d 7a657400                    o-omzet.

 Item  36 -- Length:   28  Offset: 4844 (0x12ec)  Flags: USED
  12ec: 00001ecb 1a001c40 13000000 62727574  [EMAIL PROTECTED]
  12fc: 6f2d6f70 6272656e 67737400           o-opbrengst.

 Item  37 -- Length:   28  Offset: 7224 (0x1c38)  Flags: USED
  1c38: 00004e1d 22001c40 13000000 62727574  ..N."[EMAIL PROTECTED]
  1c48: 6f2d6f70 6272656e 67737400           o-opbrengst.

 Item  38 -- Length:   28  Offset: 7196 (0x1c1c)  Flags: USED
  1c1c: 000025a3 22001c40 13000000 62727574  ..%."[EMAIL PROTECTED]
  1c2c: 6f2d6f70 6272656e 67737400           o-opbrengst.

 Item  39 -- Length:   32  Offset: 7164 (0x1bfc)  Flags: USED
  1bfc: 00003008 32002040 15000000 62727574  ..0.2. @....brut
  1c0c: 6f2d6f70 6272656e 67737465 6e000000  o-opbrengsten...

 Item  40 -- Length:   32  Offset: 7132 (0x1bdc)  Flags: USED
  1bdc: 0000ac1f 31002040 15000000 62727574  ....1. @....brut
  1bec: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  41 -- Length:   32  Offset: 7100 (0x1bbc)  Flags: USED
  1bbc: 0000f225 2a002040 15000000 62727574  ...%*. @....brut
  1bcc: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  42 -- Length:   32  Offset: 7068 (0x1b9c)  Flags: USED
  1b9c: 0000284f 3c002040 15000000 62727574  ..(O<. @....brut
  1bac: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  43 -- Length:   32  Offset: 7036 (0x1b7c)  Flags: USED
  1b7c: 00002f55 19002040 15000000 62727574  ../U.. @....brut
  1b8c: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  44 -- Length:   32  Offset: 7004 (0x1b5c)  Flags: USED
  1b5c: 00003155 17002040 15000000 62727574  ..1U.. @....brut
  1b6c: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  45 -- Length:   32  Offset: 6972 (0x1b3c)  Flags: USED
  1b3c: 00006b75 09002040 15000000 62727574  ..ku.. @....brut
  1b4c: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  46 -- Length:   32  Offset: 6940 (0x1b1c)  Flags: USED
  1b1c: 0000ac88 18002040 15000000 62727574  ...... @....brut
  1b2c: 6f2d6f70 70657276 6c616b74 65000000  o-oppervlakte...

 Item  47 -- Length:   28  Offset: 6912 (0x1b00)  Flags: USED
  1b00: 000038ba 02001c40 11000000 62727574  [EMAIL PROTECTED]
  1b10: 6f70656e 73696f65 6e000000           opensioen...

 Item  48 -- Length:   24  Offset: 6888 (0x1ae8)  Flags: USED
  1ae8: 0000db0d 27001840 0f000000 62727574  ....'[EMAIL PROTECTED]
  1af8: 6f707265 6d696500                    opremie.

 Item  49 -- Length:   24  Offset: 6864 (0x1ad0)  Flags: USED
  1ad0: 00002a18 10001840 0f000000 62727574  [EMAIL PROTECTED]
  1ae0: 6f707265 6d696500                    opremie.

 Item  50 -- Length:   24  Offset: 6840 (0x1ab8)  Flags: USED
  1ab8: 00006541 12001840 0f000000 62727574  [EMAIL PROTECTED]
  1ac8: 6f707265 6d696500                    opremie.

 Item  51 -- Length:   24  Offset: 6816 (0x1aa0)  Flags: USED
  1aa0: 00007262 12001840 0e000000 62727574  [EMAIL PROTECTED]
  1ab0: 6f707269 6a730000                    oprijs..

 Item  52 -- Length:   28  Offset: 6788 (0x1a84)  Flags: USED
  1a84: 0000c413 24001c40 12000000 62727574  [EMAIL PROTECTED]
  1a94: 6f72656e 64656d65 6e740000           orendement..

 Item  53 -- Length:   28  Offset: 6760 (0x1a68)  Flags: USED
  1a68: 0000ea09 3c001c40 13000000 62727574  ....<[EMAIL PROTECTED]
  1a78: 6f2d7265 6e64656d 656e7400           o-rendement.

 Item  54 -- Length:   24  Offset: 6736 (0x1a50)  Flags: USED
  1a50: 0000d54c 28001840 0e000000 62727574  ...L([EMAIL PROTECTED]
  1a60: 6f72656e 74650000                    orente..

 Item  55 -- Length:   36  Offset: 6700 (0x1a2c)  Flags: USED
  1a2c: 000086c1 2b002440 19000000 62727574  [EMAIL PROTECTED]
  1a3c: 6f2d7265 6e74652d 696e6b6f 6d737465  o-rente-inkomste
  1a4c: 6e000000                             n...

 Item  56 -- Length:   32  Offset: 6668 (0x1a0c)  Flags: USED
  1a0c: 000086c1 23002040 18000000 62727574  ....#. @....brut
  1a1c: 6f72656e 74652d69 6e6b6f6d 7374656e  orente-inkomsten

 Item  57 -- Length:   24  Offset: 4796 (0x12bc)  Flags: USED
  12bc: 00001fcc 13001840 10000000 62727574  [EMAIL PROTECTED]
  12cc: 6f73616c 61726973                    osalaris

 Item  58 -- Length:   24  Offset: 4820 (0x12d4)  Flags: USED
  12d4: 0000fbca 2b001840 10000000 62727574  [EMAIL PROTECTED]
  12e4: 6f73616c 61726973                    osalaris

 Item  59 -- Length:   24  Offset: 4872 (0x1308)  Flags: USED
  1308: 000008ca 1b001840 10000000 62727574  [EMAIL PROTECTED]
  1318: 6f73616c 61726973                    osalaris

 Item  60 -- Length:   24  Offset: 6644 (0x19f4)  Flags: USED
  19f4: 000035c3 27001840 10000000 62727574  ..5.'[EMAIL PROTECTED]
  1a04: 6f73616c 61726973                    osalaris

 Item  61 -- Length:   24  Offset: 6620 (0x19dc)  Flags: USED
  19dc: 000069c7 25001840 10000000 62727574  [EMAIL PROTECTED]
  19ec: 6f73616c 61726973                    osalaris

 Item  62 -- Length:   24  Offset: 6596 (0x19c4)  Flags: USED
  19c4: 000042c5 31001840 10000000 62727574  [EMAIL PROTECTED]
  19d4: 6f73616c 61726973                    osalaris

 Item  63 -- Length:   24  Offset: 6572 (0x19ac)  Flags: USED
  19ac: 0000cbbe 24001840 10000000 62727574  [EMAIL PROTECTED]
  19bc: 6f73616c 61726973                    osalaris

 Item  64 -- Length:   24  Offset: 6548 (0x1994)  Flags: USED
  1994: 0000dec2 0e001840 10000000 62727574  [EMAIL PROTECTED]
  19a4: 6f73616c 61726973                    osalaris

 Item  65 -- Length:   24  Offset: 6524 (0x197c)  Flags: USED
  197c: 0000d8c0 18001840 10000000 62727574  [EMAIL PROTECTED]
  198c: 6f73616c 61726973                    osalaris

 Item  66 -- Length:   24  Offset: 6500 (0x1964)  Flags: USED
  1964: 00000dc2 05001840 10000000 62727574  [EMAIL PROTECTED]
  1974: 6f73616c 61726973                    osalaris

 Item  67 -- Length:   24  Offset: 6476 (0x194c)  Flags: USED
  194c: 00004380 1e001840 10000000 62727574  [EMAIL PROTECTED]
  195c: 6f73616c 61726973                    osalaris

 Item  68 -- Length:   24  Offset: 6452 (0x1934)  Flags: USED
  1934: 000027bb 17001840 10000000 62727574  ..'[EMAIL PROTECTED]
  1944: 6f73616c 61726973                    osalaris

 Item  69 -- Length:   24  Offset: 6428 (0x191c)  Flags: USED
  191c: 00000806 0b001840 10000000 62727574  [EMAIL PROTECTED]
  192c: 6f73616c 61726973                    osalaris

 Item  70 -- Length:   24  Offset: 6404 (0x1904)  Flags: USED
  1904: 00009207 0f001840 10000000 62727574  [EMAIL PROTECTED]
  1914: 6f73616c 61726973                    osalaris

 Item  71 -- Length:   24  Offset: 6380 (0x18ec)  Flags: USED
  18ec: 00004809 29001840 10000000 62727574  ..H.)[EMAIL PROTECTED]
  18fc: 6f73616c 61726973                    osalaris

 Item  72 -- Length:   24  Offset: 6356 (0x18d4)  Flags: USED
  18d4: 0000bb09 23001840 10000000 62727574  [EMAIL PROTECTED]
  18e4: 6f73616c 61726973                    osalaris

 Item  73 -- Length:   24  Offset: 6332 (0x18bc)  Flags: USED
  18bc: 0000710a 31001840 10000000 62727574  [EMAIL PROTECTED]
  18cc: 6f73616c 61726973                    osalaris

 Item  74 -- Length:   24  Offset: 6308 (0x18a4)  Flags: USED
  18a4: 0000e00d 35001840 10000000 62727574  [EMAIL PROTECTED]
  18b4: 6f73616c 61726973                    osalaris

 Item  75 -- Length:   24  Offset: 6284 (0x188c)  Flags: USED
  188c: 00006611 01001840 10000000 62727574  [EMAIL PROTECTED]
  189c: 6f73616c 61726973                    osalaris

 Item  76 -- Length:   24  Offset: 6260 (0x1874)  Flags: USED
  1874: 0000aa12 0d001840 10000000 62727574  [EMAIL PROTECTED]
  1884: 6f73616c 61726973                    osalaris

 Item  77 -- Length:   24  Offset: 6236 (0x185c)  Flags: USED
  185c: 00002d13 3d001840 10000000 62727574  [EMAIL PROTECTED]
  186c: 6f73616c 61726973                    osalaris

 Item  78 -- Length:   24  Offset: 6212 (0x1844)  Flags: USED
  1844: 00001316 39001840 10000000 62727574  [EMAIL PROTECTED]
  1854: 6f73616c 61726973                    osalaris

 Item  79 -- Length:   24  Offset: 6188 (0x182c)  Flags: USED
  182c: 00006018 08001840 10000000 62727574  [EMAIL PROTECTED]
  183c: 6f73616c 61726973                    osalaris

 Item  80 -- Length:   24  Offset: 6164 (0x1814)  Flags: USED
  1814: 0000811a 0c001840 10000000 62727574  [EMAIL PROTECTED]
  1824: 6f73616c 61726973                    osalaris

 Item  81 -- Length:   24  Offset: 6140 (0x17fc)  Flags: USED
  17fc: 0000ba1e 2f001840 10000000 62727574  ..../[EMAIL PROTECTED]
  180c: 6f73616c 61726973                    osalaris

 Item  82 -- Length:   24  Offset: 6116 (0x17e4)  Flags: USED
  17e4: 00007120 1b001840 10000000 62727574  ..q [EMAIL PROTECTED]
  17f4: 6f73616c 61726973                    osalaris

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  17cc: 0000aa23 0b001840 10000000 62727574  [EMAIL PROTECTED]
  17dc: 6f73616c 61726973                    osalaris

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  17b4: 00002930 09001840 10000000 62727574  ..)[EMAIL PROTECTED]
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  13c8: 6e670000                             ng..

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  1320: 0000382e 22001c40 13000000 62727574  ..8."[EMAIL PROTECTED]
  1330: 6f2d7569 746b6572 696e6700           o-uitkering.


<Special Section> -----
 BTree Index Section:
  Flags: 0x0001 (LEAF)
  Blocks: Previous (12811)  Next (12769)  Level (0)

  1ff0: 0b320000 e1310000 00000000 01000000  .2...1..........


*** End of Requested Range Encountered. Last Block Read: 39248 ***

Tom Lane wrote:
Jo De Haes <[EMAIL PROTECTED]> writes:

I asked the developper to delete all imported data again an restart the import. This import crashed again with the same error but this time on another block.


2006-03-27 00:15:25.458 CESTERROR: XX001: invalid page header in block 48068 of relation "dunn_main" 2006-03-27 00:15:25.458 CESTCONTEXT: SQL statement "SELECT phone FROM dunn_main WHERE source_id = $1 AND duns = $2 "
        PL/pgSQL function "proc_dunn" line 29 at select into variables
2006-03-27 00:15:25.458 CESTLOCATION:  ReadBuffer, bufmgr.c:257
2006-03-27 00:15:25.458 CESTSTATEMENT: SELECT proc_dunn ('J M Darby','TA4 3BU','215517942','1','01','S',NULL,'0219',156,1
54,387166)


But again, when i do the 'SELECT proc_dunn ('J M Darby','TA4 3BU','215517942','1','01','S',NULL,'0219',156,1
54,387166)' statement now, it works without errors.


That is *really* strange.  Are you certain that the function is
examining the same table you are?  I'm wondering about multiple
similarly-named tables in different schemas, or something like that.


If I would like to dump block 48068 now with pg_dumpfile, how do i know which file this block belongs to?


See
http://www.postgresql.org/docs/8.1/static/storage.html
and/or use contrib/oid2name.

                        regards, tom lane

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