Brion Vibber wrote:
This made me suspect a C++ version library mismatch or some other silly thing perhaps caused by installing a single binary across OS versions, so I rebuilt our wikidiff2 RPM separately on FC3 and FC4, and made sure the FC4 boxes were running the FC4 version.
The bad log entries immediately dried up, so.... so far so good. :)
- -- brion vibber (brion @ wikimedia.org)
Congratulations. You did a good job catching it :) It was an awkward problem.