When the user logs, a /usr/bin/nepomukserver runs. If the user exits the session and then re-enters, there are 2 of such processes and so on. If enter 5 times, the last time 5 processes are listed

Reproducible: Always

Steps to Reproduce:
1. login
2. logout
3. login
4. logout
Actual Results:  
If the user is "alfred":
ps axu | grep alfred | grep nepomuk
shows 2 processes still running /usr/bin/nepomukserver

Expected Results:  
no /usr/bin/nepomukserver running belonging to that user

Also waiting for a long time does not solve the issue, processes are not killed, I have to slay the user.
Every 5,0s: ps axu | grep pippo | grep nepomuk | grep -v watch         Wed Aug 29 17:34:19 2012
alfred     3378  0.0  0.0  57980  8620 ?        S    17:01   0:00 /usr/bin/nepomukserver
alfred     3852  0.0  0.0  57980  8616 ?        S    17:02   0:00 /usr/bin/nepomukserver
alfred     7059  0.0  0.0  57980  8616 ?        S    17:26   0:00 /usr/bin/nepomukserver