The big change for 0.03 is theming support (more info here). Here is the changelog:
0.03 New Features * BGUI now has themeing support (for mow info go here: http://stokes.dyndns.org/redmine/projects/bgui/wiki/Theming) Bugs Fixed * BGUI widgets could sometimes clip with scene elements Other Stuff * Widgets are now stored in OrderedDicts to allow for control over z sorting * BGUI now uses relative imports so there are less restrictions on where the module is placed
You can grab the new version here.
- Blender 2.5 (r31649 or later for the example to work)