Previously I had only tried my camcorder footage HD DVDs, but I did some more testing of several different homemade HD DVDs on the HD-A2...
All my OTA, cable & satellite TS files converted to HD DVD work fine. They're all between 9-18 mbps, the latter bitrate from the good old days before HD-Lite. The few I've created menus for, the navigation is sluggish. I've found no difference between SL, DL, or -R/+R discs. Some discs, the playback stutters, but if I jump one chapter back or forward, the playback becomes normal again. Skipping around or FF/REW can cause the stutter again.
Michael, I agree w/you though. The Memorex 2.4x DL seem to be more problematic. However, my Fuji 2.4x DLs all play smoothly.
My Sony HC3 camcorder footage HD DVDs stutter no matter what. I only have DL discs of those at this point, so don't know if SL would play smoothly. The problem I think is that the HC3 footage is 25 mbps/sec. I'm guessing the A2 can't handle this on DVD media. Hope someone else can test this.
Audio is finnicky. Some DD5.1 tracks don't lock on my Onkyo SR604 receiver via HDMI. So, I'm using an optical connection as well & that has been fine so far.
HD Media Keen Videosaurus