This bug doesn't affect me personally as I am VIP and can access new enhancements through the icon on main page. But I have noticed that I cannot access new enhancements (of course after I earned them) by trainers. They simply do not let me and the trees do not show up. I must assume non-VIP's are getting access to the tree's via trainers or their would be much more noise -- or maybe everybody can access through their main page and so no one has mentioned this.