if anyone's listening, i pinned the culprit down to the library folder on the root drive. couldn't pin it down more closely without devoting much time to analyzing everything within the folder. so as an utter act of desperation, i ran CacheOut X, ordering it to delete just about everthing it could lay its hands on. after reboot, had reclaimed about 30 gb of space, and the library folder had dropped from 33+gb to 3+gb. i figure it's still holding on to about 2 gb of space for no reason. but i can live with it without freaking.
i'd like to index and all, but it's so damn butt-slow i give it an hour, see its progress and decide the hell with it. once i tried letting it index the hard drive overnight. i don't remember details, it having been so long ago, but i remember getting po'd that it didn't complete, or had crashed, or something so that even overnight i didn't get an index in the morning. how important is indexing the hard drive anyway??? ah well.