Image of the error message

Today, I got this error message back when flagging a revision (image included as attachment):

PHP fatal error in /usr/local/apache/common-local/php-1.5/extensions/FlaggedRevs/FlaggedRevs.class.php line 2264:
Call to a member function equals() on a non-object

(here is the diff, it that helps http://de.wikipedia.org/w/index.php?title=Adana&diff=49658258&oldid=49560867)

The error was not reproducible (and I never encountered it before), so presumably it's not a big deal.

Another thing is the way it is displayed: The error message is shown in all languages (so it's quite long).

Version: unspecified
Severity: minor

Attached: