Do specific Twitch.tv streams not work on the PS3?

The stream I want to watch is http://www.twitch.tv/riotgames but when I try to open it in any quality I get a "Media Server Error: 80710723. Other streams work just fantastic on 720p. Any reason why this is happening? If not, is there any other way I can watch the riotgames stream with my PS3?

THANKS!!!
-D.Nips