title: Eclipse and PDT: I can not type f letter anymore
body: <p>Sorry if it appears as stupid question, but really I can not work anymore, and this is ... sad.
  Eclipse continue to assign F to format code (Menu->Source->Format). I found a way to reset to default, but suddenly after switching to other window (browser) eclipse restore the key binding. I can go back anymore.</p>
  
  <p>Is there a quick direction to follow to make it work as before? there is something that could cause this to happen? what? a key sequence? it worked until now, where do I look for a possible cause of such a weird behavior?</p>
  
  <p>I do changed file /usr/lib/x86_64-linux-gnu/gtk-2.0/2.10.0/menuproxies/libappmenu.so (s/Eclipse/Xclipse/) for ubuntu menu, could it had caused the problem?</p>