Skype incoming call window is completely hidden with dual displays

so the issue does not happen in a single monitor setup?

Correct, it shows up fine with a single monitor.

I just discovered this bug under rather the worst possible circumstances after upgrading to 12.04 LTS.

As I was receiving a work-related daily conference call from my coleagues I had to bashfully admit via text messages that I couldn't pick up the voice call as I couldn't find anything to actually click on... although I could hear the call ringing.

You can imagine the comments from the other end like "Yeah... Linux... why don't you install a real OS?" and "Is Unity really that bad?" stuff like that. All the stereotypes about Linux confirmed as far as the non-linux users on the call are concerned.
Also... totally embarasing professionaly for me.

I hate to say it, but this really a Unity-killing bug for me. If I can't use Skype on a dual screen, I can't use Unity. Because I need both. Giving up 50% of my screen real estate is not an option. Giving up skype isn't either.

So I probably will have to switch back to 'Gnome classic'. Too bad really, I could probably get used to and grow to like Unity eventually. But looks like it is really not an option for me until this bug is fixed.

Anyhoo.. I hope this little anecdote can amuse you all... and maybe help quantify the severity of this bug which I see is still set to 'undecided'. I'd vote 'Critical' = 'Major loss of functionality'.

Keep up the good work :-)