From that thread:
Heh. It doesn’t help that the company’s connection is fairly slow (at least compared to my cable access at home). I go to the homepage from here, and it pops up instantly. At work it takes about 15 seconds, and Windows keeps going back to it when I click back to the window where I’m typing. As I said, this behaviour doesn’t happen on my Mac. And if a dialog box opens while I’m elsewhere, it will remain in the background and I’ll hear ‘Excuse me, [application] needs your attention.’ I can give it my attention when I want to.
I haven’t finished the other thread yet, but I’m getting the impression that there’s not a box I can check somewhere that says ‘Always stay in the active window’. Is that correct?