The extensions UserDailyContribs seems to include null edits in its edit counts.
This can be seen at [1] where the edit count for the last 180 days is larger than the total edit count for the user.
I think it is caused by the ArticleSaveComplete function in UserDailyContribs.hooks.php[2]. That function updates the count without checking if any change was made. I think such checks can be made with $revision or $status of the ArticleSaveComplete hook[3].
[1] http://sv.wikipedia.org/w/api.php?action=userdailycontribs&user=ErfgoedBot&daysago=180&format=xml
[3] http://www.mediawiki.org/wiki/Manual:Hooks/ArticleSaveComplete
Version: unspecified
Severity: normal