I really liked the Surreal theme on my 8330, until I realized my keyboard wasn't lighting up. Once I deleted the Surreal theme, the keyboard went back to normal. I assume the Surreal theme was the cause...or it was just a STRANGE coincidence.
I would be weary with the 8330 as well, which might explain why I am getting the following message from mobile.blackberry.com when I go to download themes..."sorry, there are no available themes for your blackberry device. (8330, OS 4.3.0)"
This makes me really sad..