Once it was up, everything worked - except Adobe Photoshop CS3. It complains that "Licensing for this product has stopped working". There's a knowledgebase entry at Adobe's site, and a license repair tool, and a cleanup utility. I tried all of those. No luck. I spent 4 hours on the phone with Adobe tech support yesterday morning. We got nowhere. They promised me a callback within 24 hours. 23 hours later, they left a message on my voicemail closing the case because CS3 isn't supported on Snow Leopard.
At this point, I'm stuck. Even if I could afford the $200 upgrade to CS4 right now (and believe me, I've got plenty of better places to put $200), I have no reason to believe that the upgrade would actually work. We manually cleaned every last bit of CS3 off of my system, as well as everything else Adobe, and the problem persisted. This tells me that Photoshop put something on my disk somewhere that I can't get at it, and if that's the case, then the likelihood that CS4 will even run is not 100%: what if it finds the piece that's keeping CS3 from running, and decides that it shouldn't run either?
There's one person who commented on the Adobe knowledgebase entry that said she had to buy a whole new computer to get a critical project done after encountering this same issue. I'm not able to do that, either, even if I wanted to.
This whole thing shows that Adobe's licensing support is unacceptably brittle for a program that costs over a kilobuck. I wish there was suitable competition. (No, the GIMP does not qualify.) I don't know what I'm going to do next, since several of the things I do are dependent on Photoshop features that have no equivalents in anything else. (The biggest one that tripped me up recently was the outer glow layer style.)