Comment 6 for bug 556636

Confirming problem.
 PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
 2056 root 20 0 26948 6060 2364 R 100 0.1 29469:31 backend
22705 root 20 0 26948 6128 2464 R 100 0.1 1:05.64 backend

I have "backend" process running for a while. I started the System->Administration->System Testing. Deselected all tests and moved to finish. Aplication closed and left another "backend" process behaind

uname -a:
Linux <HOSTNAME< 2.6.32-22-generic #33-Ubuntu SMP Wed Apr 28 13:28:05 UTC 2010 x86_64 GNU/Linux

lscpu:
Architecture: x86_64
CPU op-mode(s): 32-bit, 64-bit
CPU(s): 4
Thread(s) per core: 2
Core(s) per socket: 2
CPU socket(s): 1
NUMA node(s): 1
Vendor ID: GenuineIntel
CPU family: 6
Model: 37
Stepping: 2
CPU MHz: 3201.000
Virtualization: VT-x
L1d cache: 32K
L1i cache: 32K
L2 cache: 256K
L3 cache: 4096K

Peace