I'm running emacs build "GNU Emacs 2311 (x86_64-redhat-linux-gnu  GTK+ Version 22423) of 2014-11-27 on x86-010buildbosredhatcom" on Exceed On Demand (X windows) The following scenario happens to me almost every time I perform it: 1) I save changes in the current buffer  2) I click on another window and emacs loses focus  3) when I return focus to the emacs window  the text buffer is unresponsive to keystrokes  the text cursor does not blink  and the only thing that breaks emacs out of this frozen state is to activate a menu bar (simply popping up a menu bar and then dismissing it by clicking on the text buffer is all that's needed)