Pretty common, even on Mint 13/14. I had the same thing. The problem is that Ubuntu takes a button push as hard-core physical lock. It seemed if you happened to roll the right combination of numbers, you're wifi was locked out. Take a look at this answer on the Ubuntu forums:
»ubuntuforums.org/showthread.php? ··· =1968317--
That's "MISTER" Kafir to you.