Weird: Safari & iTunes can't access internet, Firefox can!

[NewGenAdam]

I've restarted, but to no avail.
I'm connected to an Airport Extreme. iTunes and Safari can't connect to the internet, but Firefox can.
Also, Firefox can connect to local network stuff (e.g. AirSharing iPhone app), but I can't through Safari or Finder's "Connect to server..."

Any ideas? I'm confused...

 

[SFStateStudent]

^^^ I noticed that as well during that time frame; seems to be fine now...