John Nack, the principal product manager for Photoshop at Adobe, last week announced on his public blog that CS3 and earlier have not been tested on Snow Leopard.
There have been reports of CS3 being unstable on Snow Leopard surfacing around the web - including CS3 crashing when fonts are changed. Photoshop CS2, however, is listed as not compatible with Snow Leopard.
"While older Adobe and Macromedia applications may install and run on Mac OS X Snow Leopard (v10.6), they were designed, tested and released to the public several years before this new operating system became available," the document states. "You may therefore experience a variety of installation, stability, and reliability issues for which there is no resolution. Older versions of our creative software will not be updated to support Mac OS X Snow Leopard (v10.6)."
Support for CS3 is available through the paid version of Adobe's support program, John continues to say. He also continued on to point out that there are a few minor problems with CS4 in Snow Leopard, though most of the suite works fine under Apple's new operating system. He said that the only major problems remain in Flash panels and Adobe Drive/Version Cue.
"Adobe will support Creative Suite 4 software running with Snow Leopard according to its standard customer support policies," Adobe said. "Older versions of Adobe Creative Suite software were not designed to run on Mac OS X Snow Leopard (v10.6), so you may experience issues installing and using the software for which there are no solutions."
It appears that this move by Adobe is to encourage users to upgrade to CS4, which was released back in 2008. PC World has performed an independant test of CS3 on Snow Leopard, and concluded that "Adobe CS3 Purrs on Snow Leopard".
Snow Leopard was released on Friday 28th August worldwide, and is now available to the public.