I haven't run into any problems yet with CS3,
Snow Leopard does seem to be noticeably faster though. Glad I made the switch.
Daddy-o
Was afraid I might have to recant my recommendation after this weekend. I use an open source java-based program to run model trains called JMRI. After struggling to solve a communication issue, I found the following on the JMRI site:
"If you're using Mac OS X 10.6 (Snow Leopard), you first have to configure Java on Mac OS X for "32 bit" operation. Mac OS X 10.6 can run in either 32-bit or 64-bit mode, but the communications libraries we currently use are only available in 32-bit mode. To do this, open the "Java Preferences" application from the Utilities folder inside the computer's Applications folder, then set the default "Java Application" in the lower window to "Java SE 6 32-bit"."
An easy fix once you know about it, but quite worrisome until you do. Not sure if it will address anyone's issues here, but figured it can't hurt to spread the word.
Daddy-o