IE 7 and standard links

[Laphan]

Hi All

A friend has told me that links that worked fine in IE 6 on a PC are now not
working in IE 7. The only thing they can see is that these links have the
following common traits:

a) long file names, ie about 30 plus chars

b) underscores in the filenames.

c) They are derived from the old asp routine to force a pdf download rather
than open them up in the browser window.

I'm desperately trying to borrow a PC to install IE 7 (I don't want to
affect my own PC in anyway at the moment) to test this, but has anybody else
come across the same problems?

Thanks

Laphan