Strange, I only see this warning in Win32 AS Perl 5.6; it's not present under Linux 5.6.1/5.00503 or even Cygwin 5.6. With your variation, the warning comes out afterwards, so it looks as if the first line is the problem: 
About to import
Imported
main::mysub() called too early to check prototype at C:\Projects\GPerl
+\Test\g1.pl line 1.
mysub: 1

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   MeowChow                                   
               s aamecha.s a..a\u$&owag.print

In reply to Re: Re (tilly) 5: No excuses about not using CGI.pm by MeowChow
in thread variables not posting? by stuffy

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