Comment 3 for bug 719691

Tested the x86_64 kernel on a Lucid box (unfortunately, didn't have access to the Karmic box that problem was originally produced on) and can confirm that on the stock kernel, the problem is present, and on your patched kernel, the problem is resolved.

Sweet turnaround on that, Andy -- a patch and test kernel build in less than the time it took me to next check my email.