I installed Powerkernel v45 when it came a few days ago as OTA update and everything was fine until today when I tried to take a photo. The application didn't start as didn't either the BlessN900.

I removed BlssN900 and the Fcam drivers and rebooted the N900 and after that camera worked just fine. Then I installed the FCamera and the Fcam drivers with that and also the BlessN900. Now the standard camera and also FCamera and BlessN900 works just fine.

I have no issues with the GPS fix or any other issues with this Powerkernel version.