Photoshop CS4, not sure when it came out, but, my dad recently got it.

CS4 is nearly no different than CS3. CS4 has video features and is much more applicable to be used by professional photographers. CS3, though, is more apt to be used by commercial designers, due to its extravegant 3D software in CS3 extended.

Graphic Artists will also have a much better time in CS3.