I't rather odd. Adobe would be stupid to ignore that big a chunk of the market. If you look around, you find references in their docs like: "Photoshop CS2 can address approximately 3.5 GB of RAM on a Power Macintosh G5 running Mac OS X, a Windows XP 64-bit Edition system running an Intel Xeon processor with EM64T, or an AMD Athlon 64 or Opteron processor." So the do seem to acknowledge supporting AMD, and other than some fairly esoteric apps, I doubt there is much that would run on Intel but not AMD or vice versa. Maybe Adobe is getting some kind of kickback from Intel not to hilight the competition.

"Democracy is a pathetic belief in the collective wisdom of individual ignorance." - H. L. Mencken