Firefox bookmarks toolbar broken…

This started for me somewhere around Firefox 2.0.0.10 ish and it’s really annoying.

When Firefox is first launched, the initial window is fine. I have my bookmarks toolbar:

Any new window I create (and I do use multiple windows regardless of tabbed browsing), the bookmarks toolbar goes blank…

It doesn’t seem related to any plugins that I’m aware of. I’ve tried disabling most. I can’t imagine that it’s an actual bookmark in this folder but it could be.

Has anyone else seen this?

Edit/Update: This appears to be directly caused by or related to the use of Automated QA’s Test Complete Add/On:

Disabling this puppy and my problems go away.