The IDLE about dialog does not report the full version of TK. For instance it will report "8.5" and not report the last minor version number such as "8.5.9". On the Mac OS X this is problematic (but it could be a problem on other platforms) because Apple ships their own version of TK which is known to be buggy. For bug reporting purposes IDLE should report the full version of TK which could help diagnose bugs.
Attached is a patch the works for both Python 3.4 and Python 2.7. I have tested this patch on OS X and Windows. The code actually came from macosxSupport.py function tkVersionWarning.
At some point, I would like us to review the whole 'about' dialog, but this should be done now. It even simplifies the code. I will test and apply this week if Roger doesn't.