There is a problem with the application "A better camera". It's able to take images but not processing them. More people has also reported this issue in KP50 thread.

I suspect that is due to HD codecs rather than kernel. The difference between "Bless N900" and "A Better Camera" is that the latter uses DSP for faster image processing and that is precisely where the app gets stacked.

Apparently there is also a new problem reported with KP50 but is related with module loading.

To confirm the issue I yet need to try with "Bless N900" and then return to "A Better Camera" without HD codecs. I'm running KP49.