*** This bug is a duplicate of bug 553328 ***
    https://bugs.launchpad.net/bugs/553328

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

-- 
Program backend consumes more than 90% CPU after System Testing
https://bugs.launchpad.net/bugs/556636
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