> The problem has been resolved. The issue seems to be with the rrdtool
> version 1.3.1. We rolled back to version rrdtool-1.2.27 and everything
> works.

Aha - this may be related to the 'lazy mode' bug, which was in 1.3.0 (affecting 
routers2) but I believed it to have been fixed in v1.3.1.

Basically, to be more efficient, routers2 (and probably mrtg-rrd) enable 'lazy 
mode' when asking to create the graph images.  If the existing image age is 
sufficiently young that it does not need to be recreated then RRDtool will not 
bother to waste time recreating it - the bug was causing RRDtool to then output 
incorrect graph sizes.  In this case, we may have something similar, or the 
graph is not being created, or is created corrupt.

There is a patch for routers2 that will disable lazy mode completely to get 
around this (v2.19 actually detects RRD 1.3.0 and disables lazy mode itself) so 
if you still want to try it out then let me know.  I may make this a permanent 
option in the routers2.conf as well in v2.19.

It is worth trying out this workaround because, if it is a lazy-mode bug, then 
Tobi needs to be notified so that he can investigate.

Steve

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