Hi Boomyal,
Regarding question #3, I'm actually referring not to the act of posting, but clicking on the "New Posts" link to see who else has posted since your last visit. Many functions, like that one, are treated by the system as searches, since they go through the search system. And since a lot of people click that link every time they visit, and early in their visit, I was just wondering if perhaps you'd clicked it before trying to access the "My Posts" option, as it might explain the problem.
The fact that it works on one computer and not another points to some sort of browser issue. It's possible your cache isn't clearing properly for some reason. As a general rule, when something works on one computer but not another, the computer itself almost always plays a role, otherwise the problem would be consistent across both of them. You said you're using the newest version of IE at work, where the problem is; I assume that's IE 8? Any chance they'd let you install a copy of Firefox there to see if the problem is the computer, or just the browser?
