Turns out it was the gnome-cups memory leak bug that's already been filed, so you can close this report. When I posted to the Ubuntu forums I was only asked to compare the total system load as it appeared in top, and wasn't asked to take note of particular processes, so that's why I thought it was something different. Sorry for causing confusion.
Craig -- CPU load https://launchpad.net/bugs/58407 -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
