I got the sleep working on my EP45-UD3L on Lion 10.7.4 except this morning it refused to wake for the first time. Here what my Mac journal have to say :

12-06-27 09:42:02,000 kernel: Wake reason: ?
12-06-27 09:42:02,000 kernel: SMC::setPowerState ERROR: smcPublishSleepCause failed (kSMCKeyNotFound)
12-06-27 09:42:04,910 configd: network configuration changed.
12-06-27 09:42:06,187 ntpd: bind(25) AF_INET6 XX::XX:XX:XX:XX#123 flags 0x11 failed: Can't assign requested address
12-06-27 09:42:06,187 ntpd: unable to create socket on en0 (14) for XX::XX:XX:XX:XXe#123
12-06-27 09:42:17,000 kernel: Graphics suppressed 15564 ms
12-06-27 09:42:17,591 configd: network configuration changed.
12-06-27 09:42:18,611 configd: network configuration changed.
12-06-27 09:42:18,621 mDNSResponder: mDNS_RegisterInterface: Frequent transitions for interface en0 (192.168.1.104)
12-06-27 09:43:02,621 powerd: PMScheduleWakeEventChooseBest: m=0.00 s=0.00 a=0.00

I replaced my Mac address by XX::XX:XX:XX:XX

Any hint on what might have caused the glitch ?