I just hit the 'F' key if I ever want to block out background elements...however this is almost never necessary as I have a neutral desktop wallpaper, and a dedicated Space for PS. I much prefer the floating window nature of CS3.
While I am glad MDI mode is optional, the rest of the interface looks like a big step backwards from CS3.
While I am glad MDI mode is optional, the rest of the interface looks like a big step backwards from CS3.