+- 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. The same
+ applies to wxFlexGridSizer as well.
+
+- wxBoxSizer::AddSpacer(x) now adds space in the direction of the sizer only
+ and not in both this and the orthogonal directions. This behaviour is what
+ most of the people expect but if you really relied on this overload adding
+ space in both directions you should change your code to use AddSpacer(x, x).
+
+- wxTextCtrl::LoadFile no longer sends a text update event.
+
+- wxXmlDocument::Save()'s indentstep argument's interpretation was fixed
+ to match the documentation: it now really is the number of spaces in
+ indentation instead of being its double. Its default value was changed
+ accordingly, to 2.
+