I'm making a website. I designed it in photoshop and my image size is 800x600. When I click "save for web & devices" it brings me to a preview.

The preivew, however, is distorted. Everything looks tall and it says that my resolution is still 800x600. Why is this?? When I emailed the psd to my friend to check out he had the complete opposite problem. It looked distorted BEFORE he clicked "save for web" and then his preivew looked fine.

What's my problem and how do I fix it? Any help is greatly appreciated!!