CS4 works, with some caveats:
- Dreamweaver, which replaced GoLive as part of the CS suite, works. If you use GoLive, it doesn't.
- There are some weirdnesses with Bridge. I don't use Bridge, so that doesn't bother me.
- If you use a scanner or an all-in-one printer/scanner with a TWAIN driver, it probably won't show up in the Import menu. You may need to run Photoshop in 32-bit mode rather than 64-bit mode, as most TWAIN scanner drivers won't run in 64-bit mode.
