The problem is rather erratic and unpredictable. For example, I watched 'Fearless' and 'Eragon' without a hitch, but while watching 'High Fidelity', every 1-2min the video would get hung up and the blue bar came up at the bottom for everything to reload and continue. All movies are ripped with the same process, Handbrake x264 codec, ~1.5gb. Movies are stored on external Seagate 750gb hard drive plugged into my Airport Extreme(802.11n). At first, I thought the read/write speed of the external HD was a problem. However if that was the case I assume the 'hang up' would be present during any streamed movie, which is not the case. Perhaps it is the network, although I would assume that would be a constant problem. My iTunes Music library is ~120gb, and my iTunes Movie library is ~150gb. Could the size of the library be the culprit? My Macbook is only 802.11g, and from what I understand, on an 802.11n network, if any device exists that is slower than .11n, it slows the whole network down to that speed. Streaming music is no problem. My concern is only with video. Has anyone had a similar problem, or can offer any insight as to a solution. Thanks in advance.