Hi! Dries has commited my patch which centralizes all those print theme('page', $output); calls. If you return a string from your callback, it will be printed by theme('page', $output); so there is no need to do that yourself. In this way, we can put a callback's output into a block as well. If you do not return anything, nothing happens. So I hope I have not broken backwards compatibility. You probably need to empty your menu cache 'cos this patch killed system_admin_page 'cos it was totally unnecessary. Regards Karoly Negyesi