Still happening, updated to the latest everything in Hardy.
This time I made a tarball of /proc/<pid> of the affected process; I can upload bits of that if it would be helpful to anyone.
I checked in /var/log/kern.log and discovered that a totem segfault immediately preceded the unkillable process, but several other totem segfaults had occurred recently apparently with no ill effect.
Haven't seen this on any other hardy machines though.
Still happening, updated to the latest everything in Hardy.
This time I made a tarball of /proc/<pid> of the affected process; I can upload bits of that if it would be helpful to anyone.
I checked in /var/log/kern.log and discovered that a totem segfault immediately preceded the unkillable process, but several other totem segfaults had occurred recently apparently with no ill effect.
Haven't seen this on any other hardy machines though.