Flashing this in recovery should fix bluetooth.
Sent from my Nexus 7 using Tapatalk HD
Does your build for the nexus 4 have the same issue?
bluetooth.default.so gets compiled from external/bluetooth/blue droid but I haven't made any changes from cyanogenmod's source in that repo and in the official nightlies BT seems to work fine. It could be some compiler flag, next time I'll try building without the -03 optimizations.