Last modified: 2013-06-21 00:26:09 UTC
If one creates two list items and then tries to bold them at the same time, the items are removed and replaced with a pawn symbol. This is reproducible on the version currently deployed on the English Wikipedia.
Dupe of bug 49732 which is fixed in master and wmf8; will get that pushed to production wmf7 tonight. *** This bug has been marked as a duplicate of bug 49732 ***