My problem with IE is that I lose history in the context of my back and forward buttons. If I've been on line a while, I'll just stop being able to hit them and get anywhere.

The reason: the browser cache/"Temporary Internet Files" is full. I've set MSIE to delete files when I close it. (It doesn't delete cookies, just all the HTML stuff) If the back button quits working, I dump the temp files or just close MSIE and it's fine.

This isn't the same thing as losing cookies, but it seems like it might likely be related.