Fix for Wifi issues in Mountain Lion

I've tried all the solutions on the forums that I could find and none of these fixed my wifi issues.  This however did:
- Change the SSID of your wireless network.
I'm pretty sure I had a similar issue with Lion and sorted it by deleting all the preference files like others have said, but it didn't work for me this time.  I'm convinced that the common issue is that it's a corrupt or duplicate config. 
Anyway, I thought I'd post this to help others.

UPDATE
A week or so ago my wifi suddenly stopped working again on both my Macbook and Mac Mini.  Note that my PC, iPad and iPhone continue to work. 
I've changed my SSID twice now and this time I was determined to figure out an alternative solution.  Again I tried every solution I could find, this time what worked is chagning my router to only broadcast on the 'N' wireless band. 
This has fixed it however it's not a great solution as my wireless printer is 'G' only.  Until Apple resolve this issue I'm happy to print with a network cable if it means my Macs work.

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