Internet Explorer 7 specific: Discrover & Invite friends is two boxes

Description:

With my account, using IE7 as the active web browser, the "Discover & Invite Friends" button is screwed up.

Instead of seeing one box with the text "Discover & Invite" inside of it, the user sees two boxes using IE7. This also causes "My Friends" and "Map view/List view" to turn all blurry.

Repro Steps:
1. On a PC running XP open IE7
2. Navigate to Brightkite.com
3. Sign into an account
4. Click on "Friends"

Result: With IE7 as the active web browser, the "Friends" page has two boxes and the text "Discover & Invite Friends" is floating outside of both

Expected: That the "Friends" page and the "Discover & Invite Friends" box will look the same on IE as on FF2