Last modified: 2012-11-01 14:41:08 UTC
FlaggedRevs is showing the code of an <a> tag in the log provided after clicking on "revreview-log-toggle-hide" in the attached URL (see the text between the "stable-logentry-config" and the "stabilization-def-short" messages).
Actually, this also happens for other log entries: https://pt.wikibooks.org/wiki/Special:Log?type=stable
I already fixed this in Gerrit change #27846.
Oh, I see. Wikibooks is running "1.21wmf2 (83aa470)" and the change is listed on [[mw:MediaWiki 1.21/wmf3#FlaggedRevs]]. Thanks.