Upload Problem

Hello:

I primarily use Mozilla Firefox with WordPress to upload files and complete all admin related tasks. I’ve created two more user accounts, both people use Internet Explorer. I’ve received recent complaints from them – when they attempt to upload files and images, the upload dialog is displayed in the lower right hand corner of the screen and is cutoff. I also tried using IE, and for some reason the image didn’t upload. When I go into Mozilla Firefox, it is centered and works perfectly! What could be wrong?

We have done two things in the past two months, changed our web hosting provider, and upgraded to WordPress 3.0.1.

Thanks in advance for your help!