I observe there are several references to SUPER:: that are NOT of the $w->can('SUPER::...') form:

babylon5:root:~:4 # grep -n SUPER /usr/lib/perl5/site_perl/5.10.0/Tk/M
+Listbox.pm
32:        $w->SUPER::Populate($args);
89:        $w->SUPER::Populate($args);
99:        my (@ret) = $w->SUPER::configure(@_);
120:    $w->SUPER::Populate($args);
334:#    $w->SUPER::Populate($args);
[download]

Should these also be changed?