The misc.php plugin part does not redirect after unvoting on vb403. No idea if it works on vb4.1 but 4.03 needs to eval that code and needs the array() construct removed.
Code:
vb403 works: eval(print_standard_redirect('bop5_uv_unvoted', true, true));
//vb403 fails: print_standard_redirect(array('bop5_uv_unvoted'), true, true);
Thanks for the mod none the less, 'cos it works nicely now