I wanted to add that this issue also affects python 2.5.1 on the Mac.
Sometimes I may be writing something in the interpreter and I decide to 
invalidate my input by pressing Ctrl-C. This will exit the interpreter 
occasionally. I think it would be a good idea to see if there's a way 
to make the interpreter bullet proof from Ctrl-C, or at least good 
enough so that a single Ctrl-c won't cause the interpreter to exit.