I have a new XPS 435T with a Radeon ATI 4350 video card running Windows Vista Home Premium.  I have a problem that shows up primarily when I'm on a site like Flickr where I am viewing thumbnails of photos posted by multiple posters.  The images seems to post fragmented and over whatever was on the screen before.  It looks like it is loading new thumbnails without clearing out the last ones that were displaying.  It does this consistently, and the only way to clear it is to refresh the browser.  This does not happen on any of my other computers so I know it has nothing to do with the website.  In all other aspects, this computer seems to handle graphics well -- I use it primarily for photo processing and it is very fast with Photoshop, etc.  Any idea why it would be loading images, or partial images, on top of images when viewing certain websites like Flickr?  Any help would be appreciated.  Thanks.