Themes that work properly on OS 188.8.131.527
I am currently running an OS 607/623 hybrid and the only theme I have found to date that runs properly on it is:
Appleberry 2.0 by Andrew Hastings
If anyone knows of any other themes that are working properly on it, please post them here.
One of the problems I have found, besides lag, icons sticking and not opening on the first try is when you hold your blackberry in landscape mode and press the red phone key, you will notice that the screen turns into portrait mode and leaves a white side bar about 3/4 inch thick on the side.
This doesn't happen with Appleberry, but I'm sure there are other themes out there that work as expected also.