+- wxLoadFileSelector() now allows the user to select existing files only.
+
+- 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.
+
+- Custom log targets should be updated to override wxLog::DoLogRecord() method
+ instead of DoLog() or DoLogString() and must be updated if they call the base
+ class versions of these functions as this won't work any more; please see the
+ documentation of wxLog for more information.
+
+- Confusing wxGridSizer(int cols, int vgap = 0, int hgap = 0) ctor which was
+ easy to mistake for wxGridSizer(int rows, int cols) overload was removed, you
+ will need to specify both vertical and horizontal gap if you want to use this
+ overload or specify both rows and columns and the gap otherwise. Use of the
+ new constructors taking wxSize for the gap argument is preferred.
+