Same for me.
ESC key is not working for me either, I noticed about a day ago. I've got a Black Macbook which is about 2 months old. Everything else is perfect.
Sorry, also now alt+ESC works instead of ESC e.g. when i go to spaces ( shows you all your spaces - that screen) alt+ESC works but not ESC. Not sure if its just for spaces, can someone please check on theirs? 🙂
EDIT (again): Just enabled shortcut command for Frontrow, default Command + ESC, and this work...so ESC must be working, but not correctly :S