No prob here with TB. Maybe reflash?
What I noticed for 1hr usage:
1. Seems slower than latest 10.1 nightly;
2. On initial setup got email FC 3 times (for no reason?!)
3. GMaps is still jumpy

4. Camera overlay is distorted/flickering, no 6MP takes 8MP photos though;
5. Focal crashes on next start if most settings are changed. 6MP works. Autofocus is crappy at close distance. no location data in photos, and date is 01.011970 00:00 + Time zone. lol
6. NO Calendar app?!
7. Pairs BT headset, haven't tested it yet. GPS works, mobile data 2g/3g works.
8. Dialing and receiving call works no prob. Haven't tested sms.