Hulu Performance - Mac mini

This may have already been covered, but I couldn't find anything. I've been using a mac mini as an HTPC for about 6 months or so. Specs are:

1.66 Ghz Intel Core Duo
2GB DDR2
Snow Leopard

I've got it hooked up to a 1080p display, and everything works perfectly except for hulu. I use plex to play .mkv files and also stream with netflix. The video is perfectly smooth on everything, except hulu where it's jittery. I've tried both the hulu desktop and streaming through Safari and the results are the same. Bandwidth isn't the issue, as the buffer is always full. Is there anything that can be done to fix this?

I suppose I could try this. Most of the mkvs i play are 720 anyhow.

Yeah, honestly I'm surprised that everything works as well as it does. Hulu is the only minor inconvenience. And honestly it's watchable, my wife has never complained, but I'm a perfectionist so it irritates me a bit.