WP-Admin Not Displaying Correctly

I’ve encountered a very strange problem. When my co-blogger logs into her wp-admin she sees a Dashboard screen that is all screwed up, almost like it can’t connect to the stylesheet correctly. It occurs for all of the admin pages on her computer. See a screenshot here:
http://www.anotherleaf.com/Screenshots/strangeDashboard.png

Here’s another screenshot of the screwed up Add Post page:
http://www.anotherleaf.com/Screenshots/strangePost.png

However, when I login as myself on MY computer, I experience NO problem. Here is the normal screenshot for reference:
http://www.anotherleaf.com/Screenshots/normal.png

Here’s where it gets really weird, when I login as HER on MY computer, I experience this same problem on the Dashboard page but once I navigate to other pages (like create a new post, etc) it no longers shows this problem but looks normal.

I created a new user for her and logged in from my computer — all was well. But when she logged in from her computer it had the SAME issue as the other user.

We have tried restarting her computer. We both are using macs with the same operating system. I’m going nuts trying to figure out whats up. I tried deleting the Ozh Admin Toolbar plugin thinking it might have something to do with it, but it did not solve the issue.

Also I just tried disabling ALL plugins and the problem persists in the admin pages.

I have no idea what to try next??

ANY IDEAS? Anyone ever experienced something similar??

Here is the system info: Headway Version: 2.0.13 WordPress Version: 3.3.1 PHP Version: 5.2.17 MySQL Version: 5.1.53-log Web Server Info: Apache Browser Info: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.7; rv:10.0.2) Gecko/20100101 Firefox/10.0.2 PHP cURL Support: Yes PHP GD Support: Yes PHP Memory Limit: 256M PHP Post Max Size: 8M