sporadic oops and freeze when booting 2.6.39-2-amd64 on debian wheezy

Dear kernel mailing list,

the boot process freezes sometimes(average once from 15 boots) since 2.6.39-2-amd64.

I have uploaded a kernel.log when the boot process freezes:
http://www.tech-chat.de/files/kern_failed.log

After waiting 15min I made a hard reset and this time the computer booted successfully:
http://www.tech-chat.de/files/kern_working.log

I have cropped the date and made a diff with
awk 'BEGIN{FS="]"}{$1="";print $0}' kern_failed.log > kern_failed_without_time.log
awk 'BEGIN{FS="]"}{$1="";print $0}' kern_working.log > kern_working_without_time.log
diff -uN kern_failed_without_time.log kern_working_without_time.log> diff.log

http://www.tech-chat.de/files/diff.log

Here some interessting parts from the diff.log
...
BIOS-e820: 00000000cfea8000 - 00000000cfed0000 (ACPI NVS)
BIOS-e820: 00000000cfed0000 - 00000000cff00000 (reserved)
BIOS-e820: 00000000ffe00000 - 0000000100000000 (reserved)
- BIOS-e820: 0000000100000000 - 00000001a0000000 (usable)
+ BIOS-e820: 0000000100000000 - 0000000220000000 (usable)
...
-last_pfn = 0x1a0000 max_arch_pfn = 0x400000000 +last_pfn = 0x220000 max_arch_pfn = 0x400000000
...
-TOM2: 00000001b0000000 aka 6912M
+TOM2: 0000000230000000 aka 8960M
...

-  Normal zone: 8960 pages used for memmap
-  Normal zone: 646400 pages, LIFO batch:31
+  Normal zone: 16128 pages used for memmap
+  Normal zone: 1163520 pages, LIFO batch:31
...
-  IP: [<ffffffff81042b3d>  load_balance+0x5e4/0x688
-  PGD 1605067 PUD 0
-  Oops: 0000 [#1  SMP
-  last sysfs file: /sys/module/crc_itu_t/initstate
-  CPU 3
--
-  IP: [<ffffffff81042b3d>  load_balance+0x5e4/0x688
-  PGD 1605067 PUD 0
-  Oops: 0000 [#2  SMP
-  last sysfs file: /sys/module/nfsd/initstate
-  CPU 0

...

I think the BIOS reports sometimes bogus data? The motherboard is a Asus M4A89GTD-PRO/USB3 with BIOS 2101
(http://www.asus.com/Motherboards/AMD_AM3/M4A89GTD_PROUSB3/#download)

This all leads finally to:

Jul 13 17:02:01 PhenomBabe kernel: [   13.137385] BUG: unable to handle
kernel paging request at ffffffff0a646ecf
Jul 13 17:02:01 PhenomBabe kernel: [   13.141181] IP:
[<ffffffff81042b3d>] load_balance+0x5e4/0x688
Jul 13 17:02:01 PhenomBabe kernel: [   13.141181] PGD 1605067 PUD 0
Jul 13 17:02:01 PhenomBabe kernel: [   13.141181] Oops: 0000 [#2] SMP

Any hints on that or may I provide further data?

Please add me to CC if possible.

Thank you very much,
best regards Andy