problem with hack using multiple inheritance for plugins

[massimo s.]

Uh, oh.

I think I found the bug, and it was a *really stupid bug*.
The list of GUI_PLUGINS was empty... so there was no plugin class that
was inherited.

I'm embarrassed to have wasted your time that way. However I learned a
lot about new-style classes and so on, so for me it was a learning
experience nonetheless.

Really sorry for wasting your time. I should use a debugger, I know. :
(

Thanks a lot for your patience,

M.