I have a 2GHz AMD Athlon, and an Nvidia GeForce FX-5200. I run LinuxMCE using UI2 (medium).
When I start LinuxMCE, it works fine. Play-back is smooth. Xine uses around 10% of my CPU. After I watch a few movies or TV episodes, however, playback becomes noticeably jerky, at which point Xine is using > 30% of my CPU. The same problem presents itself for MPEG-2 and MPEG-4.
Anyone know why this is happening? Would it be solved if I moved to UI1, or bought a new Nvidia card, and moved to alpha-blended UI2?