Loads of notices when editing a menu item

I was introduced to all of these lovely PHP notices when I saving or deleting an item from my menu:

Notice: Undefined index: wds_title in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-taxonomy.php on line 60

Notice: Undefined index: wds_desc in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-taxonomy.php on line 60

Notice: Undefined index: wds_bctitle in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-taxonomy.php on line 60

Notice: Undefined index: wds_canonical in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-taxonomy.php on line 60

Notice: Undefined index: post_type in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 122

Notice: Undefined index: enablexmlvideositemap in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 142

Notice: Undefined index: post_type in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 122

Notice: Undefined index: enablexmlvideositemap in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 142

Notice: Undefined index: post_type in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 122

Notice: Undefined index: enablexmlvideositemap in /sites/memiahsites/wp-content/plugins/wpmu-dev-seo/wds-files/wds-core/admin/wds-core-metabox.php on line 142