After update to the following versions, the problem goes away automatically after a while, i.e. the mouse pointer with the hand and a document next to it changes back to a normal mouse pointer after a short time and mouse clicks and Alt-Tab work again. Good enough for me.
enigmail 2:1.4.3-0ubuntu0.12.04.1 thunderbird 14.0+build1-0ubuntu0.12.04.1 xfdesktop4 - same version as before - linux-image-3.2.0-26-generic 3.2.0-26.41 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1018326 Title: enigmail grabs mouse and does not release it To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/enigmail/+bug/1018326/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs