wxPyAssertionError with wxListCtrl and wxListCtrlAutoWidthMixin

Dear Robin and Chuck,

Is it a virtual list control? If so, then you need to always provide a
OnGetItemImage method, even if it just returns -1. If not, then it is a
bug. Please distill it down to a small sample that shows the problem.

It IS a virtual list control. Providing a OnGetItemImage method
that returns -1 fixes the problem.
Thanks again for your repeated help.
Arye.