Could anyone else with the BFS kernel and the CSSU update 16 or 16.5 check if they still have the call distortions.

It didn't happen to me once since upgrading a few days ago. Since I realized it I also tried to force it by doing something on the phone that utilizes a lot of CPU time and then calling myself. This was something that normally always caused the distortion. But until now it didn't happen even once.

I know the new CSSU update fixes to some memory leaks and probably more stuff of hildon-desktop... so after all it might not have been a directly BFS related thing.