>>It closes IE instance. For example, I go to Forum Main page, Downloads section, then select file, download it - and the page is gone. I experienced this behavior only at work, at home it works just fine. I checked all settings, but didn't find any responsible for this behavior.
>
>I don't know if that is applicable, but what is you reinstall the browser? If not at the latest version, you could take that opportunity to upgrade.

Well, it's 5.50 version already, which I believe is the latest, right? I've just downloaded new Nick's class (BTW, it's great, because I intend to use it in my current project), and the page disappears :(

Well, seems I have to...