From the XDA thread (author atinm):
A: Issues that I can remember:
- Video playback - some formats are not recognized, use an alternative app for video playback
- Camera - some modes don't work
- TVout, MHL
- Issues when using the 2G/3G-Switch
- Volume issues (some report too high, others too low)
The only one of those that has affected me was the 2G/3G switch. I lost signal after toggling that and had to reboot and wait a few minutes before I had signal again. The native FM radio app doesn't work; am unsure if other radio apps do. Haven't personally had issues with camera or video formats.