Avi Playback Problems

Hi, just got mine recently and it’s been great so far. However, I’ve had some major problems playing certain .avi files. I can play them just fine but the video seems to lag. I was wondering if anyone else was experiencing the same problems, if the problems were hardware related, and if  there were any possible solutions.

It could be the codecs.  Have you checked to make sure that the codecs for those video are supported by the WD TV?