Dragonchild,
I've been tinkering with it for a while, but don't seem to be having much luck with positional arguments as opposed to named ones. Named parameters seem to be working fine, I just don't seem to do anything, but check for existence of positional arguments.
Just prior to the 'Dependancies' section on the documentation of the module it says....

or this for positional parameters:

 validate_pos( @_, { type => SCALAR }, { type => ARRAYREF, optional =>
+ 1 } );
By default, parameters are assumed to be mandatory unless specified as
+ optional.
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However, if I enter something like this...

#!/usr/bin/perl

#use strict;
use warnings;
use Params::Validate;

sub func1 {
    validate_pos( @_, { type => SCALAR} );

    print "hi fluffy\n";
}

func1("test");
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I get the following...

Argument "SCALAR" isn't numeric in subroutine entry at ./a.pl line 8.
Parameter #1 ("test") to main::func1 was a 'scalar', which is not one 
+of the allowed types: 
 at ./a.pl line 8
    main::func1(3) called at ./a.pl line 13
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Any ideas why this is so? Ideas....?

Regards Paul