I'm having issues seeing specific WiFi networks. I'm running Ubuntu 14.04.1 on a late 2010 MacBook Air. At first I thought it was the internal wireless adapter so I bought a USB one but that didn't solve the problem. I also can't see the same networks if I use the MacOS X (Mavericks) partition so I'm a bit lost as to why this could be.
I ran the wireless-info script with the USB wireless adapter attached
I'll post it in a comment because I get an error for too long a post.
This is the link to the log.