Richard for fcamera and related apps to work you'll need fcam drivers from extras-testing (maybe even devel, I'm not sure), not extras proper as they are too old. ... stock kernel and have fcam-drivers 1.0.6-1 fcamera will not work.
@RichardN900 Thanks for asking that. I'm on the same boat. Now I have to ask... do you want me to jump in first or you'd like to go and take the lead?
@RichardN900 - so far there are no reports of any application incompatible with CSSU-thumb, at least I am not aware of. And having in mind that users were > 700 2 months ago, I boldly say there is no such app. Besides those that have problems with KP itself(fcam for example), but you should be fine as you have 720p already