Last modified: 2005-01-14 13:45:49 UTC
At http://it.wikipedia.org/w/index.php?title=Gratteri&curid=30850&action=history one can see the following history (times are UTC+1): # corr) (prec) 18:51, Gen 13, 2005 82.55.161.110 # (corr) (prec) 18:23, Gen 13, 2005 Speciale:Contributions # (corr) (prec) 18:19, Gen 13, 2005 Speciale:Contributions # (corr) (prec) 18:07, Gen 13, 2005 82.55.161.110 Two revisions at 18:19 and 18:23 has been attributed to "Speciale:Contributions", which of course isn't a registered user.
*** Bug 1329 has been marked as a duplicate of this bug. ***
It seems the reason is that the stored username of that author is empty, so that the link to this author's contributions looks like Special:Contributions?target= which probably renders wrongly on the page history. You can see the empty name on the respective diff page. (I have spotted the error at http://en.wikipedia.org/w/index.php?title=Defenestrations_of_Prague&action=history)
This should only have occurred during a brief time yesterday because of a configuration error. The problem is now fixed (although the blank usernames will still appear in the history). Please reopen if it's still happening.
