Also, I transferred a few videos onto my N900, 5 movies and 1 tv show. All the movies seem to work great, but only the tv show is very laggy and annoying. In its properties the data rate is 980 kbps, and bitrate 1111 kbps. I compared to the other movies' properties and it seems a tiny bit higher. Is that why it's lagging?

I hanen't seen any other codecs in extras, so I'm assuming there are no updates to improve playability?