Well as you might have noticed I've made a new default OS theme, a simple grey theme. This will be the base theme for the forum for the time being. Now each game section has it's own overriding theme. Which once you move to that section it will display.
So the MxO section has a Matrix theme and the DDO section has a Dungeons & Dragons theme. This will override any current theme you have active. You can also set these as your perminenate theme, that will only change if you go into a game specific area.
Of course there are still minor image and style adjustments to do. I'm not too happy with the Matrix theme.
If you find something that doesn't match or suit let me know.
Enjoy,