+- Erase background events are now not generated at all when background style is
+ changed. See the updated wxWindow::SetBackgroundStyle() description in the
+ manual for more details.
+
+- wxTreeCtrl::GetSelection now asserts if the tree has the wxTR_MULTIPLE style.
+ Instead use GetSelections() for multiple items; or if you want only the
+ single item last touched, the new wxTreeCtrl::GetFocusedItem.
+