Oh, and I've tried everything
~changed the litter back to what he used to use.
~I scoop twice as often. One day last week, I had scooped, was carrying the bag to the trash (that tells you how recent the scooping was) and he peed on the kitchen rug right in front of me.
~I moved litterboxes to try different levels of privacy.
~I removed lids on the hooded boxes because I know he doesn't like them.
~I experimented with different levels of litter.
~I added yet another box.

I did everything that people typically try.... so its either behavioral (ticked off about Tony, since it all started as soon as he returned from college last June) or he's got another UTI.

I'm off to clean out son's room -- its still a mess even though Ashley spent a few hours in there last week cleaning... how one 20 year old boy can make such a disaster zone in two months is beyond me. Maybe that will help him. At least it'll help me by taking my mind off everything