Tkinter "Expected boolean value"

[Jeff Epler]

You'd do better with tk8.3 than 8.4.  There were some incompatible
changes in Tk 8.4's "bind" command that cause Python problems.  I'm not
sure in what version of Python this problem is fixed.

As for your 'expected boolean value' problem, there's not enough
information for me to guess the cause.  It's not something I've heard of
before.  If you want help, your best bet would be to post a small
program that is runnable and demonstrates the problem.

Jeff