Took me a while to track this one down, but I think I've run into something. With the most recent firmware, if I play a 720p24 disc (which outputs 1080i60), I get fairly random but infrequent (and non-repeatable) dropped frames. A native 1080p24 disc, no problems. I've tried 3 HDMI cables (all using HDMI1) and there's no change, so I doubt it's a cabling issue. After reading the description of the convoluted path this model made to gaining DVD 24p output, I'm wondering if the 720p24->1080i60 conversion is running into the same frame dropping problem that made that feature difficult to engineer. Anyway, I wonder if it's already a known issue, if it's worth reporting due to the unlikelihood of a firmware fix for such an unrepeatable corner case in a model this old. I'm pretty certain what I'm seeing is an actual dropped frame and not a frame cadence issue.