I've tried Eclipse Classic 4.2, 3.5, 3.7.2, and Java EE. I've attempted to install the ADT plugin on each version, and most seem to have no trouble at all. But when Eclipse restarts, Android preferences are never available (though the files are clearly in my plugins folder). I've even tried eclipse -clean park, but no luck.
Man, setup was going so smoothly until now... Any ideas?