Adminitration Plugins panel throws lots of errors on activating/deactivating request

[maijs]

when any of plugins was ever activated and then deactivated back, so that no active plugins remain, Administration Plugins panel throws lots of errors concerning arrays.

I assume it's because no checking is being made in scripts (./wp-settings.php, ./wp-admin/plugins.php) to check whether operations with arrays (in_array(), foreach(), $array[] =...) are really performed on arrays, and as when plugin is activated and then deactivated, 'active_plugins' option in db table becomes 'a:0:{}' which unserialized is not considered as array any more..