New Macbook Air - wifi connectivity problems

Hey guys,

Hope someone can help?

I have a brand new Macbook Air which is able to connect to the internet for just a minute or two before suddenly it drops out. This is even though the signal still shows at full strength and all my other devices are still able to surf the net as per normal.

This device is straight out of the box so no 3rd party applications have been installed. I heard that the wifi has been upgraded to 802.11n on this machine, could that be an issue?

Do i need to return the machine or is there is a software fix for this problem?

Thanks heaps!

Vicky