Default [Q] bluetooth music stutters since upgrade to 4.3 stock

I recently received the OTA for my (European?) HTC One Mini, so I'm on the completely stock (not even root) 4.3 rom.

I use my phone every day as a music player in the car, through the bluetooth connection. This worked fine before. But since upgrading to 4.3 it kinda stutters every now and then. The stutters are very short, but enough to be heard and be annoying, specially since they weren't there before.

Is there something known about this Does Android 4.3 change a lot in the bluetooth stack or did HTC change something? And more importantly, how can I reverse it :).