Here's the output of dmesg from this morning. Shows a similar event:

[   61.044961] WARNING: at /build/buildd/linux-2.6.31/arch/x86/kernel/check.c:134 check_for_bios_corruption+0xe5/0x100()
[   61.044964] Hardware name: INVALID
[   61.044965] Memory corruption detected in low memory
[   61.044967] Modules linked in: binfmt_misc ppdev joydev snd_hda_codec_intelhdmi snd_hda_codec_si3054 snd_hda_codec_realtek arc4 ecb snd_hda_intel snd_hda_codec snd_hwdep snd_pcm_oss iwlagn iwlcore snd_mixer_oss mac80211 iptable_filter snd_pcm uvcvideo snd_seq_dummy videodev v4l1_compat v4l2_compat_ioctl32 ip_tables x_tables snd_seq_oss snd_seq_midi snd_rawmidi snd_seq_midi_event snd_seq snd_timer snd_seq_device psmouse serio_raw sdhci_pci sdhci ricoh_mmc cfg80211 snd soundcore snd_page_alloc sbp2 lp parport asus_laptop led_class fbcon tileblit font bitblit softcursor ohci1394 tg3 ieee1394 i915 drm i2c_algo_bit intel_agp video output
[   61.045021] Pid: 9, comm: events/0 Not tainted 2.6.31-15-generic #50-Ubuntu
[   61.045023] Call Trace:
[   61.045029]  [<ffffffff8105e788>] warn_slowpath_common+0x78/0xb0
[   61.045033]  [<ffffffff8105e81c>] warn_slowpath_fmt+0x3c/0x40
[   61.045037]  [<ffffffff810366a5>] check_for_bios_corruption+0xe5/0x100
[   61.045040]  [<ffffffff810366c0>] ? check_corruption+0x0/0x30
[   61.045044]  [<ffffffff810366c9>] check_corruption+0x9/0x30
[   61.045049]  [<ffffffff810737a5>] run_workqueue+0x95/0x170
[   61.045052]  [<ffffffff81073924>] worker_thread+0xa4/0x120
[   61.045056]  [<ffffffff81078b30>] ? autoremove_wake_function+0x0/0x40
[   61.045060]  [<ffffffff81073880>] ? worker_thread+0x0/0x120
[   61.045063]  [<ffffffff81078746>] kthread+0xa6/0xb0
[   61.045067]  [<ffffffff810130ea>] child_rip+0xa/0x20
[   61.045070]  [<ffffffff810786a0>] ? kthread+0x0/0xb0
[   61.045073]  [<ffffffff810130e0>] ? child_rip+0x0/0x20
[   61.045075] ---[ end trace 2ccf769ad2edf493 ]---
[  131.161807] tg3 0000:01:00.0: PME# disabled
[  131.173028] tg3 0000:01:00.0: irq 30 for MSI/MSI-X
[  131.228284] ADDRCONF(NETDEV_UP): eth0: link is not ready
[  131.270204] wlan0: deauthenticating by local choice (reason=3)
[  131.570208] Registered led device: iwl-phy0::radio
[  131.570253] Registered led device: iwl-phy0::assoc
[  131.570295] Registered led device: iwl-phy0::RX
[  131.570336] Registered led device: iwl-phy0::TX
[  131.611615] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  167.334967] Registered led device: iwl-phy0::radio
[  167.334986] Registered led device: iwl-phy0::assoc
[  167.335004] Registered led device: iwl-phy0::RX
[  167.335020] Registered led device: iwl-phy0::TX
[  167.393746] ADDRCONF(NETDEV_UP): wlan0: link is not ready
[  212.906180] wlan0: authenticate with AP 00:1f:33:e7:18:51
[  212.908564] wlan0: authenticated
[  212.908569] wlan0: associate with AP 00:1f:33:e7:18:51
[  212.913425] wlan0: RX AssocResp from 00:1f:33:e7:18:51 (capab=0x431 status=0 aid=2)
[  212.913435] wlan0: associated
[  212.936283] ADDRCONF(NETDEV_CHANGE): wlan0: link becomes ready
[  223.540046] wlan0: no IPv6 routers present
[  241.040131] Corrupted low memory at ffff880000005e08 (5e08 phys) = 17001200000000
[  241.040141] Corrupted low memory at ffff880000005e10 (5e10 phys) = 882009200920092
[  241.040148] Corrupted low memory at ffff880000005e68 (5e68 phys) = 0000fd00
[  361.044312] Corrupted low memory at ffff880000005e00 (5e00 phys) = 92009600000000
[  361.044324] Corrupted low memory at ffff880000005e08 (5e08 phys) = 892081600170096
[  361.044331] Corrupted low memory at ffff880000005e10 (5e10 phys) = 886009208470816
[  361.044337] Corrupted low memory at ffff880000005e68 (5e68 phys) = 0000fe00