I have a 13" MBP and a miniDisplay port to HDMI connector. I have successfully connected the MacBook to a Sony HDTV. I can use both the "Mirror Display" mode and the extra display mode. However I find that sometimes when playing movies through iTunes the video plays back jerkily on the TV. It's most noticeable in scenes that involve a lot of camera panning. I find that this is even worse when I drag the iTunes window to the HDTV (as the second display). If I just mirror the displays, the problem seems to occur much less frequently, though it still happens sometimes in that mode also (and if so, the same video plays perfectly on the MacBook display). I wonder if this is an issue with the connector, the HDMI cable, the TV or even iTunes? Has anyone else noticed this problem?