I have a Mac OS X 10.6 64bit, the problem is simple:
When I try to run something on the Python IDLE, it crashes. It crashes also when I try simply to copy/paste something.
It's happening with all python versions I've tried: 2.5 2.6 2.7 and 3.3.
I avoided this problem by using another IDE and running on it but it is not a solution.
Thanks