Last modified: 2013-05-16 17:49:07 UTC
See https://en.wikipedia.org/w/index.php?title=User_talk:Cpfc543&diff=prev&oldid=554575717 for an example.
Any ideas to reproduce this?
You could try reviewing some pages on testwiki/ee-prototype? Seems a safe, sandboxed environment. The ones I've noticed that cause trouble are "I have unreviewed your article" messages and "I have reviewed your article, and left a note" messages. Tagging is fine.