I have also some problem with the wifi.
If I am under 3 meter from my access point, there is no "problem". But if I am farest, my Note always disconnected. Every 3-5 seconds, the Note is doing a scan of the networks and cut the connection. With others phone I don't have the same problem. For example, it's impossible to listen to radios with wifi, download some stuff, there is always disconnection.
I saw that some other android phone had the same problem, is there a solution for the Note?
Thanks for your responses and sorry for my bad english.