Many times when I open a new window it opens only on half of the screen. Cannot type on it, close it or move. It's dead. Basic case: got a im message shown via shell, click to open chat on Empathy window but no, cannot use the window at all. So I have to open contact list and search that contact. Pretty frustrating. This started only few weeks ago and I cannot trace it back to some change I made.
~/.xsession-errors on Empathy case http://pastebin.com/WtZQ1RWx
Happenes when secondary screen off.
64bit Ubuntu 12.04 with Gnome Shell.