Wikimedia Bugzilla is closed!

If you browse Wikimedia Commons with Internet Explorer version 5 - 6 (but not 7-Beta) since about 4 weeks 
the upper right link "Log in / create account" will jump on "mouse over" to the left behind the Wikimedia 
Commons Logo. Thus log in with IE is nearly impossible for average users. The same happens with the 
personal user links ($User, my talk, preferences, watchlist ...).

This bug does only occour in Wikimedia Commons thus we suspected at first that it is a problem created by 
our Wikimedia Commons customization in MediaWiki namespace. So I invested many hours hunting that bug but 
can only say this:

* It is not caused by our JavaScripts (happens also with deactivated scripting)
* It is not caused by our Customizations of MediaWiki:Common.css and MediaWiki:Monobook.css (have reseted 
them to MediaWiki default during a test)
* It only happens with Monobook skin.
* it must be a hover bug of IE (it only happens if you directly move the mouse over the box that inherits 
the li-element that itself inherits the link). The relevant code snipet can be found inside the div with 
the label id="p-personal".
* It only happens at first in Wikimedia Commons. After it happened on Commons you can reproduce it as 
well in Wikipedia until you reload your browser cache. Wikimedia Commons and all Wikipedias have the same 
software version and revision, see Special:Version.
* It does not happen with IE7-Beta (although this browser still has a transparency bug there...).

As I have tried nearly everything I'm running now out of ideas and suspect that there must be some very 
minor server side difference to other Wikipedias that does trigger that bug in Commons (or does supress 
it in the other wikis).

For sure we have declared IE in Wikimedia Commons as deprecated and urge people using any other browser 
but IE (simply because of the transparency bug, as we have a lot of images with transparency and people 
did make enough failures, when they didn't notice the transparency of two "identical" images) but well we 
simply can't force every random visitor doing so. :-(

So although you probably dislike IE as much as me it's a major bug we need to catch somehow (I appreciate 
also any feedback if there's a possibibility fixing it via Common.css or Monobook.css, although I already 
tried some fixes I found on the issue via google).