Message 405520 - Python tracker

> Subsequent Command-S presses do not cause the file dialog to reappear.

Do you mean Command-S after modifying an IDLE edit window that has already been Save (or was Opened, not New)? In that case, the file dialog shouldn't appear: it saves to the existing file. To change the file, you'd need to do a Save As ... (Shift-Command-S). Or perhaps I'm misunderstanding?