Airport Utility is popping up from time to time even without me launching it. It pops up asking to setup my Airport Extreme even though it's been setup properly. Has anyone had this problem?
Try opening the preferences. There's an option there to 'monitor apple wireless devices for problems' that will pop up the utility if it thinks something is wrong. Or at least that's what it says- I have mine checked but it's never popped up even when the airport express' light is flashing amber.