There was a list of known bugs on the Sapphire wiki yesterday, but it isn't there today. The very first one on the list was a bug in the framework which made a lot of themes incompatible. This is not a theme problem... this is a ROM problem, and it will be getting worked out soon enough.
Jrummy's ROM is not even a stable and released ROM. It stated very clearly in ROM Manager before the last update that it was only posted for testing and was likely to be broken.
Have some patience. Things don't magically work within 2 days of a major release. Cyanogen hasn't even released his ROM yet. Give things a couple of weeks to settle in and let the devs work out the major bugs before panicking over something trivial like themes. The world isn't going to end.