rsyslog filling disk with errors

rsyslog is going nuts with errors on my Ubuntu 9.10 64-bit system. The same or similar errors are being written to /var/log/kern.log, /var/log/messages, and /var/log/syslog Here is a sample message:

Jul 15 11:05:50 Discovery kernel: [ 5633.554534] +------ PCI-Express Device Error ------+
Jul 15 11:05:50 Discovery kernel: [ 5633.554537] Error Severity : Corrected
Jul 15 11:05:50 Discovery kernel: [ 5633.554568] PCIE Bus Error type : Physical Layer
Jul 15 11:05:50 Discovery kernel: [ 5633.554571] Receiver Error : Multiple
Jul 15 11:05:50 Discovery kernel: [ 5633.554574] Receiver ID : 0038
Jul 15 11:05:50 Discovery kernel: [ 5633.554577] VendorID=8086h, DeviceID=340eh, Bus=00h, Device=07h, Function=00h

VendorID 8086 is Intel, and Device 340e is a PCI Express bridge chip, I think. So I have the following questions:

1. Is this a known bug, or should I suspect a hardware problem?

2. Why is rsyslog writing these errors to three different logs? Is there some way to reconfigure rsyslog only write this class of error to a single log so that my disk doesn't fill up so quickly?

This problem usually starts when the system is power cycled, and sometimes goes away after a reboot. Any advice would be appreciated.

Thanks,
--Bill