Safari won't enter fullscreen I'm currently running Safari 5.1.4 on Mac OS X Lion 10.7.3, and after bringing it out of the fullscreen mode, I quit safari using Command+Q. 

When I restarted my Mac, for some reason, Safari won't return to fullscreen mode despite attempts to click on the icon on the upper right hand corner or by going through the View menu manually. ( I've also tried the short cut keys as well, Control + Command + F, to no avail). 

Is there a way to fix this?
I just solved this problem by quitting safari and reopening it again. Once it's open, i just go into fullscreen mode again and it responded nicely.