my $lab = '8 million ways to die (1986)[HD].TAG';
$menu_item->configure(-label=>$lab, ... );

##</code><code>##

Tk::Error bad menu entry index "8 million ways to die (1986)[HD]" at /<path>/i368-linux-thread-multi/Tk.pm line 250
(caused by)
Tk::Menu::Item::configure at /<path>/i368-linux-thread-multi/Tk/Menu/Item.pm line 63
...

##</code><code>##

$menu_item = $menu_file->command(-label=>$lab, ...);