Strange, I have the same problem too, phone doesn't recognise when I change TOH, doesn't ask to install yet-to-be-installed ambiences. Other thing is that my Snow-White TOH and First-One TOH have never worked properly... the installations has always gotten me some strange stripe ambiences (white & shades of blue or white & shades of orange) which are ugly as hell. Actually I just noticed the TOH problem when I tried if the problem with my OHs had gone away with all these software updates... Now I can't even check that