Working with videopress and shortcodes

I am using videopress on one of my sites and adding videos via shortcode.
Unfortunately the Blogs MU theme does not recognize the size I want the video to be. The shortcode looks like this: [wpvideo c1qMwTXk w="640"]
Switching themes to BP Daily, Buisness, Network or other non wpmu themes it sizes them correctly but not with Blogs MU.
Any suggestions would be appreciated.