FYI, I have committed a 'git-subtree' update of libosmocore to osmocom-bb earlier today. It seemed non-intrusive to me, as most of the changes were in testing and gsm 08.08 code, both of which are not used in the ARM-target builds.
Nonetheless, if you experience strange new problems, the libosmocore update might be a possible cause.
The update was required due to a __attribute((packed)) fix by Andreas to some GSM 04.08 structures...