Ohh yeah :-(
Spent countless hours yesterday debugging my suddenly intermittent wifi connection. Turns out the NTP setting suddenly got the DIR655 to reboot exactly every 1 minute 15 seconds... Pulled the WAN link, removed the NTP option, and now it just works again - a very bad NTP client implementation in my eyes.
Never got it to work with pool.ntp.org servers BTW., so the default dlink server was in my settings, they must have messed with it or something??
Disclaimer: My 655 (rev: A3 FW: 1.33NA) has always worked perfectly for me, a nice kit with good performace...
regards,
James