Following the upgrade from 5.1.1 to 5.1.4 rdiff started to give strange results.
We noticed that there was a difference with regular expressions made in RDiff.pm.
We rolledback to the 5.1.1 version of RDiff.pm and we now get the expected results.
Can you verify the versions? Last time
has been changed besides copyright date was for TWiki-5.0.1 release, TWikirev:18946
Also, what are the symptoms?