Whenever I open a .web file -- be it by clicking a link on this website or by double-clicking on a locally stored copy -- I get an error message: "Windows cannot find 'path/filename.web'. Make sure you typed the name correctly and try again etc. etc."

The funny thing is that the file actually loads w/o any problems and I only have to close the error message window. So, it's only an inconvenience, but increasingly an annoying one. I do not get any such messages with other files (including .xar). I am using XP Home SP3, fully updated.