Does not work under WP3.1.3 Multisite BP1.2.8

Once installed and enabled network wide, all seems right on the settings page, but creating a new form the PostType (to be created) dropdown does not show every custom post type (post/page/multimedia/other/things), but instead shown ONLY-ONE element with the types concatenated “PostPageMultimediaOtherThings”.
If you look into the html source, you can see the closing option tab is not closed “</option”.