Last modified: 2012-06-23 16:48:07 UTC
I have seen some edits (typical by vandals that don't change the overall character count of an article by much) being tagged as a huge number, typically the size of the current page, when listed in the watchlist, but which doesn't appear this way in the history page. (One edit I know was this case was this diff on en.wiki [http://en.wikipedia.org/w/index.php?title=The_Powerpuff_Girls&diff=498449673&oldid=498449648] - the diff is only 163 characters, but the watchlist change reported 40,000+)
*** This bug has been marked as a duplicate of bug 37225 ***