title: Weird keyboard locks in IntelliJ IDEA (delete & arrow keys, etc.)
body: <p>While working in IntelliJ IDEA, the keyboard occasionally locks in a way that <kbd>delete</kbd> or <kbd>&lt;</kbd> <kbd>></kbd> <kbd>^</kbd> keys don't work properly anymore, in a way that <kbd>delete</kbd>  doesn't do anything anymore, and the arrow keys scroll the entire source code / editor section.</p>
  
  <p>I don't know if I am accidentially some kind of shortcut, but the only way I can get it back to normal again is closing and re-opening the IDE, which is annoying of course.</p>
  
  <p>I'm on Mac OS X Lion, latest IntelliJ IDEA CE (11.1.1), but also had it before with the previous versions. </p>