Last modified: 2013-01-04 17:32:24 UTC
http://ipv6test.wmflabs.org/wiki/index.php?title=Sandbox&diff=prev&oldid=202 This would definitely cause chaos on enwiki, and I don't see an easy fix to this.
We really should allow larger comments in the revision table. The problem is that the display length is much shorter than the content length. The size limitation is also annoying for the same reason with multi-byte chars.
We could also abbreviate ips when possible in the link text using '::'.