In the previous OS revision on my N800, the video playback was pretty much always smooth. It just seems like it gets the "hiccups" under Diablo. I've looked at the process listing to see if there's anything that starts demanding CPU cycles on about the same interval as the stutters, but haven't seen any suspects.

I tend to agree with Karel Jansens (post#25) that the N8x0 should be a rock-solid media-player without any special "tweaking" required if they want consumers to purchase them.

My Nokia 9300 does video quite well, though it supports only DivX codec and is a 150 MHz device.