I've just about had it. Problem: All videos are choppy and lose audio sync as the file progresses. The remote control responsiveness is also very... sluggish. Symptoms / Relevant Data: 1. No synchronizing, streaming only 2. WIRED network connection 3. ATV hard drive seems to be chugging away non-stop 4. ATV is very hot (although I think this is typical) 5. ATV is connected directly to Linksys WRT54G2 V1 6. Mac Pro 2.8 8-core is host with FW-800 Drobo as data storage unit 7. Test file play perfectly through iTunes MPEG-4 video file, 1.53GB, 125kbps bit rate, Low Complexity, Stereo, 3566kbps total bit rate, 960x540 video dimensions, H.264 codec. 8. 9. Can you help me out?