Downgraded to 6.23AW from 9.04 and my BT client is back on happy times. I also managed to get rid of my noisy fan problem by spraying contact cleaner in the fan's bearing area (I guess something got stuck in the sleeve bearing area) and now my unit is noise free. Still, I'll start searching for a same sized ball bearing fan.
Gary,
I guess my warranty is voided eh?
As for me, the most stable FW for overall use is still 6.23AW (I don't have a download link of 8.80 industrial so I can't give my opinions regarding that FW). Tried 8.95R, 9.02 and 9.04 but all my needs still drive me back to 6.23AW. (Subtitles, playback, BT and Samba)