I have a brand new 13" Air (haswell).
Today is day 5.
Wifi connection keeps cutting out.
I researched the fourum and found some old threads about this and did troubleshooting.
I did delete all the network prefs etc, I did downgrade the MTU in network pref to 1453 from 1500.
It does not drop wifi as often but still does.
BTW: I use an apple airport extreme with latest firmware update and have sever MBPs on the same network without dropping wifi like this new Air.
Your warranty includes 90 days of phone support. Contact Apple.
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