Still occurs with 2.6.20 in current feisty. (Was originally 2.6.15, and probably before that, though I don't recall.)
** Changed in: linux-source-2.6.15 (Ubuntu) Sourcepackagename: linux-source-2.6.15 => linux-source-2.6.20 -- system continuously boots/reboots when usb wireless keyboard is plugged in https://launchpad.net/bugs/42297 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs