Unless anyone has any other ideas. I'm forced to leave boxee (even though I love it) for plex. Here's why. It's my understanding that boxee's underlying player only utilizes one core. This becomes a prob when trying to play 1080p content at high bitrates (at least on my proc it does). It stutters, falls out of sync, etc.. I read somewhere that plex will use both cores, so I gave it a shot. Sure enough, all the videos that had been giving me probs in boxee play perfectly in plex. I really hope there are plans in place for boxee to fully utilize my proc (2.16 c2d) so I can return to it- I really do enjoy boxee better overall.
If anyone has any suggestions I'll gladly try them.