Add a third voice for no defaults on server but theme switcher hums along just fine…. in fact, neither the default theme nor the wpclassic theme were ever uploaded for this install. The only place I’ve ever had trouble with the switcher was where I tried to use a 1.2 style without realizing it.
And yes, you absolutely must have the call to the switcher on every theme’s index.php or sidebar.php or wherever you want the selector to appear. It would be nice if that sort of functionality could somehow be made “global”….
[Edit: and Root’s posts make me wonder…. there’s a couple of people having a problem viewing themes period…. maybe they haven’t the defaults installed? Root does know whereof he speaks normally, so the fact that there are a small percentage of us with a different experience does NOT mean he hasn’t a clue, y’know? So I’m off to check on that other problem….]