That Photoshop logo is the official logo for Photoshop and it was released well over a year ago. No clue about the CS4 one.
The CS4 one is from the signup page for the developers conference webcast linked on the main adobe site Clicky
Honestly, who gives a ---- about a feather or what the logo looks like, as long as you have the same functions from CS3 if not BETTER and the program actually works. smh..