I've read mixed reviews, and I'm about to purchase Adobe CS4 and want to know whether I should install my SL upgrade or not. There was a recent article "No need to wait for speedy Snow Leopard" where a reader comment says:
Stratman60 wrote: Quite amazed at Dr Bob here...Snow Leopard is not fully compatible (stable) with ANY Adobe CS4 products - I have an email from Adobe stating the fact that they are working with Apple to resolve Unexpected Quits caused by trying to 'Save' files. Pretty fundamental stuff. I also understand Adobe's testing with Flash CS4 was minimal and non existent with CS3. Photoshop will also crash on Save.
So my advice is if you're a design/creative pro then DO NOT upgrade to 10.6 until 10.6.1 which is out with the testers already (its as if they knew this would happen) is released. Neither Adobe or Apple will let on when that is. Hopefully people reading this will not lose the same amount of production time & money as I have because of what amounts to a glossy-on-the-surface upgrade but far from profesionally usable.
One other thing Adobe have posted an apology (of sorts) on their Support page. Makes me feel better. No, really it does!