Revision 1352023

Applied fix from trunk for revision: 1351778 
===

Setting a default value of DeltaManager was causing a side effect: the method setWebContextObjects was always invoked with the persistSerialized argument set to false; this was causing a series of issues (including one reported recently happening when two users login/logout to the same application from the same browser and visit another application).
 
 The commit when this bug was introduced is:
 
 Author: jleroux
 Date: Mon Jun  6 20:26:35 2011
 New Revision: 1132749
 
 and unfortunately the revision was backported to the release branches; the commit may have introduced other issues but I can't review it now.