What version of IE is it? Some have been known to containt bugs such as you are seeing.
PS: My suggestion to everyone using IE, goto: www.myie2.com
and download their program. It uses the core of IE which you already have, and it allows you to tab browse as in mozilla, it also has a very very good built in popup blocker. I've never had a popup get by it.....It also has a little button on the bottom of the browser which you can turn off the blocker with great ease if needed. It has that and tons of other great features. Personally i love it, i tried mozilla, ie, netscape, opera and some others, but MyIE2 is the best browser I've ever come across......It works on Windows 98, ME, 2000, Xp (Not sure about 95).....And if it comes up with and error about a missin .dll which mine did cuz i use Win2000Pro. They give you a link to download that file too. In other words......IT OWNZ!