I have just had an oops with 1.4.17 on my Thinkpad 560E.
It seems to be related to the serial driver after removing a pcmcia modem card. The logs said:
Dec 27 20:35:01 mercury kernel: serial: failed to unregister serial driver (-16)Dec 27 20:35:01 mercury kernel: serial: failed to unregister callout driver (-16
The processed oops is attached. There seem to be a lot of them. I am not sure if they are all useful.
Let me know if you need any more info.
Mark