Airport status bar error

Hi,

I recently upgraded to Lion, but today I noticed that the status bar was showing that I was not connected to any internet sources.
I am connected to the internet just fine, and can change my network connections through the preference pane, but the status bar is just showing those light gray wifi signal bars and displaying "No AirPort card installed"

This is more of a nit-picky problem, but the status bar worked fine before today. Now I have to do everything through the system tools network preference pane. I did not drop my computer today, nor anything that would bring me to believe the card has become loose. Besides, I'm connecting to the internet just fine, it's just that the status bar can't find the card... Even the 'System Information' is able to find the card.

I have not been able to successfully do a hardware boot (holding D while starting up?), and have reset my PRAM.

Any ideas?