Just a heads up to those who were kind enough to try out my testing tree for the HVR-1600 ClearQAM performance improvements: the fixes were merged into the mainline on Friday. So at some point you should stop using my private tree and switch back to the mainline v4l-dvb tree at:
My tree will be removed from the KernelLabs HG repository towards the end of the week to prevent people from accidentally using it when they should be using the mainline code.