The behavior of sending the entire filepath to the server is peculiar to Internet Explorer. So you should filter the filename with a regex to have a valid filename. Something like the following could do: 
my ($new_file_name) = $full_path_name =~ m!(?:.*\\|.*\/)?(.+)$!;

[download]
Update: well, it seems your problem was of another nature and already been solved: it's a bad habit to post before reading the full thread... sorry
$|=$_='1g2i1u1l2i4e2n0k',map{print"\7",chop;select$,,$,,$,,$_/7}m{..}g

In reply to Re: CGI.pm's upload gives local filename, not file itself by giulienk
in thread CGI.pm's upload gives local filename, not file itself by Wallamaster

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