I have multiple versions of python - 2.6.1 and 3.1.2. 2.6.1 is the primary install (i.e., right click on a file and "edit with IDLE" brings up 2.6), and was installed first. This issue occurs on 3.1.2, Windows XP 32-bit

If I highlight a breakpoint, run with the debugger, make a change, then save, IDLE will close all windows after saving without an error message. If I clear the breakpoint and then save, IDLE will not close. Reopening the file reveals that the save was successful. I do not need to actually be stopped at a highlighted breakpoint for this to occur (i.e. this will occur if I save at the beginning before the script has ran). If I run with 2.6.1 I do not see this issue. The save difference could be something simple, such as adding a space somewhere random.