I recall getting bit by that bug a while back. I never worked out how to detect the minor version number in the browser to make things automated; I put up two links and let the user decide if they had IE 5.51.

I seem to recall that there was some JavaScript that you could use to detect IE minor versions, but I never tried it. The difference was, for IE 5.51 do this . .

        print "Content-Disposition: filename=$filename\n\n";
[download]

instead of this.

        print "Content-disposition: attachment; filename=$filename\n\n
+";
[download]

after the Content-Type line.

Microsoft acknowledges the bug. . . how nice.

And I just remembered one last quirk. By not being able to use "attachment" IE 5.51 reads the first few bytes of a file to determine it's type (it ignores your Content-Type MIME Header!) and if it recognizes say MS-Word or MS-Excel it would open the file in the browser instead of generating a "save as" dialog. However, if the user does a file->save from the menu it will have the right name.