If you have downloaded IE 7 and are using Google Reader, is your reader working properly? Mine isn't. Might be a coincidence but it was working fine before I downloaded IE 7.
I have had a few problems with IE 7 and google services. Gmail doesn't load propoerly just coming up with a white screen. Sitemaps and Analytics keeps on logging out when you navigate to a new page. Don't know why it happens so I just use firefox.
I am having heaps of problems too although not the same problem as you. IE7 periodically freezes and then crashes for no apparent reason.
Haven't had a problem with freezing or crashing but the more I have used it today the more I dislike it.