+- Fix setting tooltips for generic wxSpinCtrl (Catalin Raceanu).
+- Added support for reading image resolutions from PNG images (scottb).
+- wxComboCtrl, wxOwnerDrawnComboBox: better support for themed and custom
+ panel backgrounds, especially on OS X.
+- Add WXK_CONTROL_A..WXK_CONTROL_Z constants (Jan van Dijk).
+- Add support for alpha channel in colours in wxSVGFileDC (snowleopard).