Did you try seeing how things are in another browser?
Edit: Just noticed your question about resetting and clearing the Temporary Internet files. Resetting takes Internet Explorer back to all its default settings. You may have to set up a few preferences after this but resetting can cure problems. For instance, IE9 behaved very strangely for me whem I first upgraded from IE8 but using the Reset button cured it.
Temporary Internet files: When you visit any web site, images such as banners, avatars and any other image content are downloaded to your computer and stored in a place called the 'Temporary Internet Files' folder. If you re-visit a site (as is the case with this one), the browser will use these cached images for displaying in web pages rather than downloading them from the Internet again. This speeds up page display.
The trouble is that, over a period of time, the cache can become bloated. There is no more room for files, or there are so many in there that the browser has trouble finding them. This can cause problems with the browser. The
first thing to try in case of strange behaviour is to try emptying the Temporary Internet files. It might not provide a cure but it's worth doing anyway.
Click on IE's 'cog' icon and go to 'Safety > Delete browsing history'. Make sure the options look like
this and then click the Delete button.
You will have to log into sites again after doing this.