>Hi everybody,
>
>I am not sure, if this is related with today's update, but I think, it is. I noticed, that when I click on some links, I see a Download file dialog instead of the page. It seems to be for .php files. Like, for instance, I checked www.frederics.com site. When I tried to click any of the links, I got this Download dialog in Opera. In IE I got 404 error.
>
>I saw messages from Michel and Cecil in the same venue. Do you think, it is all related? If so, do we need to report such behavior as a bug to MS? And what to do about it?
>
>Thanks in advance.

Try deinstalling the SP2 and reinstall it using http://www.windowsupdate.com
It seems that there is "early release" of SP2 for Windows XP that causes malfunctions to the OS.