The link https://www.mediawiki.org/w/index.php?title=Talk:Flow&workflow=rpx4cdyu8bls80rm&topic_oldRevision=rq5ggnhkuv7vogqg&topic_newRevision=rq5gfdhkeqju0av4&action=compare-revisions that I found on my watchlist leads to the following internal error massage.
"The action specified by the URL is invalid. You might have mistyped the URL, or followed an incorrect link. This might also indicate a bug in the software used by MediaWiki.
Return to MediaWiki.
[9733c713] 2014-03-03 20:09:17: Fatal exception of type Flow\Exception\InvalidActionException"
Version: unspecified
Severity: normal