I'd highly recommend you consider changing your Win2003 (production?) box to use the same Perl version as your winXP (development?) box.
Not only will you run into little quirks with Perl itself (which it sounds like you already have) but you'll also run into quirks and differences in the Core Perl modules...
Most module maintainers try to keep a fair amount of backward compatibility, but eventually the deprecated methods get turfed...