Message 273289 - Python tracker

I had a custom keymap in IDLE. Since I installed 3.6.0a3, it doesn't work anymore. Worse, I cannot switch to anything except "IDLE Classic Windows" - Apply does nothing, but when I click OK, it doesn't switch.

I suppose https://hg.python.org/cpython/rev/e6e6c71776b0 is the suspect, but I can't be sure. I tried editing .idlerc by hand, setting name, name2 and default, but nothing seems to help. :-/

Please resolve this, I'm lost without my favorite Python IDE. :-o