After it crashes by pressing any crashing key, you should restart the computer, and yes it is annoying.
Im already trying to do a temporaly fix to that, but i have not even enough people who want to help testing the fix.
It is probably we will have not a permanent fix to that issue soon.
If you are interested on testing the fix, go here and comment if it worked or not.
http://www.feral-heart.com/index.php?option=com_jfusion&Itemid=2&jfile=index.php&topic=27388.0If it does not work, tell me what operating system and version are you using and what keyboard layout.
If it continues crashing with a key, tell me what key is.
If it gives any error, tell me the exact error message.