For me the error with the admin area was due to Magic-Gallery deregistering jquery and loading its own jquery when using the Pikachoose gallery. I went into the gallery.php file and around line 126 to 128 I commented out
wp_deregister_script(‘jquery’);
wp_register_script( ‘jquery’, ”.WP_PLUGIN_URL.’/magic-gallery/js/jquery.js’, null, null);
wp_enqueue_script(‘jquery’);
The gallery still appears to be working properly and all of the features in the admin system appear to be working now.