We’re happy to announce that Photoshop CS6, Lightroom 4 and Elements 11 are compatible with Microsoft Windows 8. The only issue customers might see is with document window transparency/flickering in Photoshop CS6 caused by video drivers. The drivers that ship with Windows 8 may not be the most recent available from the card vendors [...]
I recommend that customers make sure they have the lastest drivers from either AMD or nVidia. If you still have problems with the latest drivers, try setting the Advanced Settings for OpenGL Drawing/Graphic Card Processing in the Photoshop’s Preferences>Performance… dialog so that Drawing Mode is set to “Basic.”
Microsoft has already ensured that Windows 8 is fully backwards-compatible with Windows 7 software. Adobe is just confirming that photographers can upgrade with peace of mind knowing that their existing workflow can still be used on the other side.