Aivar, thank you for opening the issue.

I believe what I meant about tkinter bind calls would be to conditionallly bind '<Command+^>' to a function that returns 'break', thus claiming that the key combination has been handled and that tk should ignore it.  The function could do nothing or it could display a message.

I don't know if this would work until it were tested.  And it would be a real kludgy workaround and until disabled would block the key combo from working when the tcl people did fix it.  So not to be done lightly.