[SleepyP]

I'm having some problems figuring out what's causing this. During playback of HD movies in either x264 or h264 formats, periodically its like the playback "hesitates", for lack of a better word. It doesn't seem to happen with any consistency. It doesn't seem to be an obvious case like scenes with lots of motion and/or high bit rates. Also it doesn't matter if the files are being played from a local harddrive or streamed over my Gigabit LAN. Its almost as if something else is happening in the background on the system which is holding up XBMC. Any ideas what could be causing this and/or how I can smooth out HD playback?

I'm outputting to a display running at 1360x768@60Hz. This system is built around an Intel Core 2 Quad running @ 2.0 GHz with 4 GB of RAM on a G33 Express chipset. Could it simply be a case of bitrate?