Trying to find out what the Circular Kernel Context Logger is, I found this article in which somebody says:
Nothing to worry about, the system
repeatedly tries to start the logger
session until it succeeds. A temporary
failure to start mostly (but not
always) happens during a system state
transition from standby -> running.
If this doesn't fit your case, this other article states:
The system state is a set of kernel
events generated by taking a snapshot
of the Circular Kernel Context Logger.
It's then possible (but improbable in my opinion) that the problem is related to system snap-shots. You might then verify in Control Panel / System / System protection, that everything seems well defined.
If none of the above ideas are useful, my only other idea would be to do a system repair.