I also had that problem. Started when my neighbors also installed UniFi. Solved it by moving the channel to 6.
It seems that all the routers also default to the same channel until it causes interference. It also seems to be very laptop specific. I.e. not an issue for newer BGN laptops, but an issue for older BG-only laptops.
This post has been edited by RAMChYLD: Jun 24 2011, 02:30 PM
Unifi laptop cant detect my unifi wireless connection