On my MacBook (running Leopard) Safari 3.0.4 will not go fullscreen, instead it leaves a small gap between the bottom of Safari and the bottom of my screen, anyone else having this problem?
Here's a SS, sorry about the size.
I've noticed that since I hide my dock but since it's only 5px it's really not noticeable.
If the Dock is on the bottom but hidden, Safari will not touch the bottom of the screen. It's something that has bug me since forever. However, right now I have the Dock hidden on the left of the screen and Safari will reach the bottom.
I know this post is fairly old now but I've just had the same problem and come up with the same question.....I've managed to make my Safari full screen by moving the dock to the left of the screen which the let me drag the safari window to fill the extra space and then I moved the dock back to the bottom of the screen.
Seems to have worked so far anyway although I haven't restarted the Mac yet so maybe it'll go back to the way it was?!?