Thanks for the replies. - Same results with ISQL + CTE - FB version 2.1.3.18185 SS on Windows 2008 Server R2 (on a VM) - will validate the db when possible.
Database info ODS Version 11.1 Page Size 8192 Pages 163560 Size on Disk 1.25GB SQL Dialect 3 Default Character Set NONE Settings Page Buffers 10000 Sweep Interval 0 Forced Writes Y Reserve Space Y Read-Only N Transaction info Oldest transaction 63483321 Oldest active transaction 63483322 Oldest snapshot 63483322 Next transaction 63483378