There are a number of problems mentioned in this thread, so sorry if I've missed this, sorry:
I had a problem like the OP before I updated the F-Camera drivers because there is a conflict between some power-kernel versions and ABC/Bless/F-Camera. My advice is: check the F-Camera driver before removing anything.

Now, I'm happily using power-kernel 0.46 with the CSSU camera, F-Camera and BlessN900 49-4 (Ovi version). Each is great for different occassions.