I’m have problems with the admin bar and YouTube clips with Internet Explorer. My problem is that Youtube clips are shown in front of the admin bar making it invisible where the YouTube clip is.
I took a screen shot: http://www.kulenbulen.se/myproblem.png (large .png image file). I haven’t made any changes to the admin bar.
What plugin did you used? I assuming that you are using BuddyPress oEmbed for BuddyPress or BuddyPress Link. The problem is in those plugins rather than BuddyPress.