> I see your point. The problem is that IDLE is somewhat included with
> Python (so in a sense it is not "3rd party"), and seems like a good
> tool for learning Python: my concern is similar to that in message
> 126276 <http://bugs.python.org/msg126276>.

Unfortunately, there is little we can do about this (IIUC). One option
would be to include a fixed Tk version, but there is none to include
(IIUC). The only real solution to "fix" both the reported problem and
the problem of msg126276 would be to stop including IDLE with the MacOS
distributions, and asking users who want to use IDLE to switch to
Linux or Windows.