I have wx app with MPL plots embedded. There are two problems I noticed
after upgrading wxPython to 2.6.1 and MPL to current CVS:
When toolbar (i.e. NavigationToolbar2WX) has parent different then wx.Frame,
(wx.Panel in my case), it crashes when clicking "Save" button.
The problem is that wx.FileDialog has to have top level window as its parent.
The workaround is eg. to set toolbar._parent=None (a dialog created with
None parent window is given the application's top level window as parent)
I haven't solved the second problem yet. It can be seen on simple_plot.py.
When I decrease window's size plot doesn't shrink like in GTK backend,
and only part of the plot is visible. It used to work properly in older
wx and MPL versions.
Marcin Wojdyr | http://www.unipress.waw.pl/~wojdyr