hang-on of mysql-server install from within Software Center

[Eugen Mitu]

Error Logs:
==============
Traceback (most recent call last):
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 717, in simulate
    return self._simulate_helper(trans, status_path)
  File "/usr/lib/python2.6/dist-packages/aptdaemon/worker.py", line 883, in _simulate_helper
    return depends, status, self._cache.required_download, \
  File "/usr/lib/python2.6/dist-packages/apt/cache.py", line 218, in required_download
    pm.get_archives(fetcher, self._list, self._records)
SystemError: E:I wasn't able to locate file for the mysql-server-5.1 package. This might mean you need to manually fix this package.

Further steps performed after hang-on and before this error:
=================================================
- Let it running for about 8 hours
- Restart
- apt-get install -f mysql-server
- Error: dpkg was interrupted, you must manually run 'dpkg --configure -a' to correct the problem
- dpkg --configure -a
- seems to perform correctly:

Processing triggers for man-db ...
Setting up libnet-daemon-perl (0.43-1) ...
Setting up libplrpc-perl (0.2020-2) ...
Setting up mysql-server-core-5.1 (5.1.49-3) ...
Setting up libdbi-perl (1.612-1) ...
Setting up libdbd-mysql-perl (4.016-1) ...
Setting up mysql-client-5.1 (5.1.49-3) ...

- Start again the Software Center
- mysql-server appear as unistalled; press Install button again