Try removing and reinstalling Google Toolbar.

All IE7 Beta testers are asked to post their comments, questions and
problems regarding IE7 to the following newsgroup.
The folks there specialize in helping you with problems such as yours and
others specific to the Beta program, and the IE7 Beta team is also assisting
in this group and anxious to hear of your experience and comments.
Even if someone here decides to provide some assistance, please post your
question, comment and/or problems to this newsgroup for the benefit of the
IE7 Beta team and other readers there:
microsoft.public.internetexplorer.general newsgroup.

On the web:
http://www.microsoft.com/communities/newsgroups/en-us/default.aspx?dg=microsoft.
public.internetexplorer.general

In your newsreader:
news://msnews.microsoft.com/microsoft.public.internetexplorer.general

Thanks.