I use the Extreme HD card (which has been excellent btw) however I have run into an interesting problem.
When I output SD timelines (which look good on the betacam deck so no issue there) the HDMI monitor (1920x1080 24" Acer) shows the SD picture with a bunch of vertical lines and odd color - washed out a bit, light purple skin tones, blue shows as light green - and the 4x3 image is stretched out 16x9.
Again, it outputs to the beta deck properly just not to the HDMI monitor. HD projects output correctly. I am using PPro CS4.