Comment 8 for bug 66900

I've found the cause of these errors on my machine.

All I need to do is remove the ohci1394 module ie:
  sudo modprobe -r ohci1394
and the messages immediately go away.

I haven't yet found a way to disable this module on bootup (blacklisting it doesn't prevent it from loading).

So it appears to be a firewire issue?
Ben Collins works on the Linux1394 project, perhaps he knows of the cause and correct fix?

Manuel/Ralf: Does this remove your error messages as well?