Bump.

The problem hasn't automagically gone away. My setup is still the same as in the first post, and the outcome is still the same:

Mplayer starts to drop both frames and audio (likely to stay in sync with video) after between 10:30 and 11:49 minutes of playback. Halting mplayer and resuming makes the problem go away -- until another ten to eleven and a half minutes have passed. I am now in the -- for me -- surreal situation that the built-in Media Player is actually better than mplayer, and I don't like it one bit. With the crawler disabled, the userfriendliness of Media Player is below that of mplayer with its GUI-ish frontend.

I've tried different transcoders, but as they all use mencoder as the backend, they unsurprisingly made no difference at all. I'm going to try a clip with PocketDivxEncoder, but I've had rather disappointing results with that transcoder and mplayer/Maemo in the past.

PS: Oh. Forgot: I tried a different card (2GB, no speed mention) and it plays in exactly the same way, i.e.: not very well.