Sitemeter somehow had some problems with IE7 last night, but it seems to be fully fixed (Impressive how fast the Sitemeter team jumped on this on a Friday night).
Before blaming Sitemeter, people should read this article. Seems like Mircorosfts's IE 7 is a little buggy and is part of the issue.
IE 8 shouldn't have the problem, so use IE8 or even better, just use Firefox. Who uses IE anyways?