It's good advice to wait for the 2nd maintenance release of any version code, which should include bug fixes found from the initial version.
You could also open a ticket with Tech Support and maybe take a wireless trace to see why your son's client wouldn't connect.
If you use a pre-shared key on your WLAN, use the Encryption options WPA2 (not Mixed or Auto) with AES (not TKIP) for best results
as all wifi devices since 2006 should support WPA2/AES.