Satellite 5 sync with ISS or RHN fails with an encoding error

Issue

• Why does satellite 5.6 fail to sync from the data comming from my other Satellite 5?
• Satellite 5 sync with ISS or RHN fails with an encoding error

Exception type <class 'psycopg2.DataError'>

Exception Handler Information
Traceback (most recent call last):
  File "/usr/bin/satellite-sync", line 139, in main
    return satsync.Runner().main()
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 229, in main
    ret = method()
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 343, in _step_packages
    self._affected_channels = self.syncer.import_packages()
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 1602, in import_packages
    [sources])
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 1576, in _proces_batch
    prompt, nevermorethan, process_function_args)
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 1556, in _processWithProgressBar
    process_function(chunk, *process_function_args)
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/satsync.py", line 1583, in _import_packages_process
    sync_handlers.import_packages(batch, sources)
  File "/usr/lib/python2.6/site-packages/spacewalk/satellite_tools/sync_handlers.py", line 385, in import_packages
    importer.run()
  File "/usr/lib/python2.6/site-packages/spacewalk/server/importlib/importLib.py", line 646, in run
    self.fix()
  File "/usr/lib/python2.6/site-packages/spacewalk/server/importlib/packageImport.py", line 297, in fix
    self.backend.processChangeLog(self.changelog_data)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/importlib/backend.py", line 138, in processChangeLog
    h.execute(name=val['name'], time=val['time'], text=val['text'])
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/sql_base.py", line 163, in execute
    return apply(self._execute_wrapper, (self._execute, ) + p, kw)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 273, in _execute_wrapper
    retval = apply(function, p, kw)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/sql_base.py", line 217, in _execute
    return self._execute_(args, kwargs)
  File "/usr/lib/python2.6/site-packages/spacewalk/server/rhnSQL/driver_postgresql.py", line 287, in _execute_
    self._real_cursor.execute(self.sql, params)
DataError: invalid byte sequence for encoding "UTF8": 0xc320
HINT:  This error can also happen if the byte sequence does not match the encoding expected by the server, which is controlled by "client_encoding".