I've been having this problem for a while with my DV27 FMJ - thought it was just a dodgy disk at first. But it now seems to affect all my DTS disks - audio is fine at first but then goes noticeably out of sync, there's a small delay in the audio. Dolby Digital tracks are fine. I've using the latest 1.81 firmware with LT23 transport. Last week I upgraded my Sony DB930 to and Arcam AVR200 so I know that's not the problem either! Just been watching Moulin Rouge (R2) but have the same problems on Back to the Future (R4) and Stargate (R2). I'm going to try some R1 titles tomorrow. Anyone else got (or had) the problem?