I'll add my name to the list of people with this same problem.
Through extensive testing I've concluded that my restarts happens only when a wireless client connects through WPA/WPA2. I've been able to "solve" the issue by using WEP instead but am really hoping there's a solution that allows me to use WPA2 since that's the security I've paid for
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Is there a Swedish phone# for RMA? I tried the self-service utility and it told me my serial-no isn't in the equipment-inventory or some such and wouldn't let me post any tickets at all.. So that's a no-go.
Anyways, gonna try unplugging wired computers as was suggested... wish me luck!