It seems as if windows clients (IE) submit filenames with backslash as directory separator.
(no surprise :-).

But the attachment plugin translates these backslashes to underscore, making the
whole path a filename.

> As far as I can see, that just means that the file will be saved with
> a filename something like `c:__92__My_Documents__92__somefile`.
> I don't see any "does not work" here. Error message?
> 
> Still, I don't mind adding a special case, though obviously not in
> `basename`. [[done]] --[[Joey]] 

This little hack fixed the backslash problem, although I wonder if that
really is the problem?
(Everything works perfectly from linux clients of course. :-)

	sub basename ($) {
		my $file=shift;

		$file=~s!.*/+!!;
		$file=~s!.*\\+!!;
		return $file;
	}

Should probably be `$file=~s!.*[/\\]+!!` :-)