I just upgraded a small site I've been working on to the latest version of the trunk cms and sapphire modules, including the new translatable changes to the site tree.
I followed the notes from Ingo's explanation of the changes (adding Lang and OriginalID fields to the SiteTree tables) and seemed to get the site working ok...
But now, all the pages in my site tree are greyed out, and the Language dropdown (which wasn't there in earlier updates) above the site tree is blank.
See attached image...