Arduino app crashes on upload

The Arduino program crashes every time without fail when trying to upload a sketch. I'm running Mac OS X Snow Leo. I have the latest version (22). Any suggestions?

Here's the crash output: http://mengestech.com/downloads/crash.txt

I had the same problem; see http://arduino.cc/forum/index.php/topic,53674.0.html for a possible fix - in my case, installing the reprap host software had messed it up.