Robert has informed me the problem is with Microsoft, not TBP. Here is his suggestion:
1. There is a patch for IE 9 that you can install and it will fix the problem you can download it from here :
2. From your desktop with no other programs running, click start > control panel > double click internet options. On the advanced tab, look under browsing and you should see two boxes to disable script debugging.
Make sure they’re both checked. Also, uncheck the box to display a notification for every error. This might minimize the number of errors you see.
3. Sometimes old cookies or temporary files can keep returning you to a script error page. Delete cookies, delete files (including offline content, and clear history). Restart your computer.