Thanks for the swift reply. I'm not sure I agree with your comment about CGI::upload though. According to man CGI:

CREATING A FILE UPLOAD FIELD
...
print filefield(-name=>'uploaded_file', ...

When the form is processed, you can retrieve the entered filename by c
+alling param():

$filename = param('uploaded_file');
[download]

i.e. param is called with the name of the field.

Then it says:

The filename returned is also a file handle...

               # Copy a binary file to somewhere safe
               open (OUTFILE,">>/usr/local/web/users/feedback");
               while ($bytesread=read($filename,$buffer,1024)) {
                  print OUTFILE $buffer;
               }
[download]

I have also tried the no strict trick mentioned there, but it didn't help. Have also checked it's not browser-dependent.