nothing on console... or out of ordinary in /var/log/messages

...
Nov  6 12:50:14 ipp033 xinetd[8457]: xinetd Version 2.3.14 started with libwrap loadavg options compiled in.
Nov  6 12:50:14 ipp033 xinetd[8457]: Started working: 4 available services
Nov  5 21:20:17 ipp033 ntpd[8576]: ntpd 4.2.4p7@1.1607-o Sat Jun 27 00:33:42 UTC 2009 (1)
Nov  5 21:20:17 ipp033 ntpd[8577]: precision = 1.000 usec
Nov  5 21:20:17 ipp033 ntpd[8577]: Listening on interface #0 wildcard, 0.0.0.0#123 Disabled
Nov  5 21:20:17 ipp033 ntpd[8577]: Listening on interface #1 wildcard, ::#123 Disabled
Nov  5 21:20:17 ipp033 ntpd[8577]: Listening on interface #2 eth0, fe80::2e0:81ff:feb1:be28#123 Enabled
...

NFS didn't start properly after reboot, had to restart

[  901.107739] nfsd: last server has exited, flushing export cache
[  901.108002] ------------[ cut here ]------------
[  901.108005] WARNING: at net/ipv4/af_inet.c:154 inet_sock_destruct+0x14f/0x16a()
[  901.108007] Modules linked in: coretemp w83627hf w83793 hwmon_vid k8temp autofs4 i2c_i801 i2c_core e1000e iTCO_wdt tg3 libphy e1000 xfs dm_snapshot dm_mirror dm_region_hash dm_log aacraid 3w_9xxx 3w_xxxx atp870u arcmsr aic7xxx scsi_wait_scan
[  901.108054] Pid: 7512, comm: nfsd Tainted: G        W  2.6.28-rc7-00105-gfeaf384 #4
[  901.108056] Call Trace:
[  901.108062]  [<ffffffff802397db>] warn_on_slowpath+0x51/0x6d
[  901.108066]  [<ffffffff80510842>] __kfree_skb+0x9/0x6f
[  901.108071]  [<ffffffff805b7388>] _spin_unlock+0x17/0x20
[  901.108075]  [<ffffffff802a4c76>] __slab_free+0x7d/0x2e9
[  901.108078]  [<ffffffff805522eb>] inet_sock_destruct+0x41/0x16a
[  901.108081]  [<ffffffff805523f9>] inet_sock_destruct+0x14f/0x16a
[  901.108084]  [<ffffffff8050d5d5>] sk_free+0x17/0xba
[  901.108087]  [<ffffffff80551d89>] inet_release+0x4e/0x54
[  901.108090]  [<ffffffff8050b0d4>] sock_release+0x19/0x71
[  901.108093]  [<ffffffff8050b5e8>] sock_close+0x22/0x27
[  901.108096]  [<ffffffff802acda8>] __fput+0xc6/0x190
[  901.108100]  [<ffffffff8059024b>] svc_sock_free+0x33/0x46
[  901.108104]  [<ffffffff805990d3>] svc_xprt_free+0x33/0x3f
[  901.108107]  [<ffffffff805990a0>] svc_xprt_free+0x0/0x3f
[  901.108112]  [<ffffffff803995bf>] kref_put+0x41/0x4c
[  901.108115]  [<ffffffff8059981e>] svc_close_all+0x46/0x5e
[  901.108118]  [<ffffffff8058f0f3>] svc_destroy+0x87/0x125
[  901.108121]  [<ffffffff8034f3c6>] nfsd+0x280/0x296
[  901.108123]  [<ffffffff8034f146>] nfsd+0x0/0x296
[  901.108126]  [<ffffffff8024becc>] kthread+0x47/0x73
[  901.108130]  [<ffffffff80234852>] schedule_tail+0x27/0x5f
[  901.108134]  [<ffffffff8020cd19>] child_rip+0xa/0x11
[  901.108137]  [<ffffffff8024be85>] kthread+0x0/0x73
[  901.108139]  [<ffffffff8020cd0f>] child_rip+0x0/0x11
[  901.108141] ---[ end trace 4eaa2a86a8e2da22 ]---
[  901.118099] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory
[  901.118118] NFSD: starting 90-second grace period