wxPython (Flex)GridSizer Failing

[bcwhite at pobox.com]

Python v2.5
wxPython v2.8.3.0

I've got an app that has a wx.Panel managed by a FlexGridSizer.  There
are 5 columns and 6 rows, all with StaticText widgets and all of
similar size.  Everything works fine until I Clear and re-fill the
sizer a few times, then it puts all of the text in the upper-left
corner.  I can clear/refill the grid to my hearts contents but it
doesn't fix itself.  However, if I resize the main window the next
clear/refill will display correctly and _sometimes_ the current fill
will change and display correctly.

I have an identical panel directly below it (vertical box-sizer) with
the same number of columns but only 1 row and it never has a problem.
Both panels are identical because it's the same custom derived class
creating them and both are added to the box-sizer in an identical way.

I tried changing to an (un-flexible) GridSizer and got a different
display but the same problem.  If anything, it occurs sooner.

Any ideas on what is happening?

-- Brian