System time warping around real time problem - please help

Ok, I had the system running about a week with "notsc" AND no power management. No system crashes so far. Nevertheless, I keep getting some kernel oopses like this from time to time. The call trace suggests that there is still an issue with timing.

Apr  3 15:09:51 rtfm kernel:  printing eip:
Apr  3 15:09:51 rtfm kernel: 49199fd0
Apr  3 15:09:51 rtfm kernel: *pde = 00000000
Apr  3 15:09:51 rtfm kernel: Oops: 0000
Apr  3 15:09:51 rtfm kernel: CPU:    0
Apr  3 15:09:51 rtfm kernel: EIP:    0010:[<49199fd0>]    Tainted: P 
Apr  3 15:09:51 rtfm kernel: EFLAGS: 00210287
Apr  3 15:09:51 rtfm kernel: eax: 3e8c329f   ebx: cfd15fac   ecx:
054f7f1e   edx: 000e213f
Apr  3 15:09:51 rtfm kernel: esi: bffffa50   edi: 00000000   ebp:
bffffa58   esp: cfd15f9c
Apr  3 15:09:51 rtfm kernel: ds: 0018   es: 0018   ss: 0018
Apr  3 15:09:51 rtfm kernel: Process lmule (pid: 27969,
stackpage=cfd15000)
Apr  3 15:09:51 rtfm kernel: Stack: c0122b4b bffffa50 cfd15fac 00000008
3e8c329f 000e213f cfd14000 bffffa50 
Apr  3 15:09:51 rtfm kernel:        bffffab0 c01091ff bffffa50 00000000
408584d4 bffffa50 bffffab0 bffffa58 
Apr  3 15:09:51 rtfm kernel:        0000004e 0000002b 0000002b 0000004e
40655501 00000023 00200287 bffffa1c 
Apr  3 15:09:51 rtfm kernel: Call Trace:    [sys_gettimeofday+59/128]
[system_call+51/56]
Apr  3 15:09:51 rtfm kernel: 
Apr  3 15:09:51 rtfm kernel: Code:  Bad EIP value.

Do you have any more ideas regarding this issue? I'd hate trying to send the board in for a check...

Regards,
Fionn (not subscribed to lklm)