diff -r 06b8e2af4411 -r 6fbed849b4f4 qtmobility/src/contacts/requests/qcontactrelationshipremoverequest.cpp
--- a/qtmobility/src/contacts/requests/qcontactrelationshipremoverequest.cpp	Fri Jun 11 14:26:25 2010 +0300
+++ b/qtmobility/src/contacts/requests/qcontactrelationshipremoverequest.cpp	Wed Jun 23 19:08:38 2010 +0300
@@ -55,6 +55,9 @@
   the individual item errors (which may be retrieved by calling errorMap()) are updated, or if the overall
   operation error (which may be retrieved by calling error()) is updated.
 
+  Please see the class documentation of QContactAbstractRequest for more information about
+  the usage of request classes and ownership semantics.
+
   \ingroup contacts-requests
  */
 
@@ -74,6 +77,7 @@
 void QContactRelationshipRemoveRequest::setRelationship(const QContactRelationship& relationship)
 {
     Q_D(QContactRelationshipRemoveRequest);
+    QMutexLocker ml(&d->m_mutex);
     d->m_relationships.clear();
     d->m_relationships.append(relationship);
 }
@@ -82,6 +86,7 @@
 void QContactRelationshipRemoveRequest::setRelationships(const QList<QContactRelationship>& relationships)
 {
     Q_D(QContactRelationshipRemoveRequest);
+    QMutexLocker ml(&d->m_mutex);
     d->m_relationships = relationships;
 }
 
@@ -89,6 +94,7 @@
 QList<QContactRelationship> QContactRelationshipRemoveRequest::relationships() const
 {
     Q_D(const QContactRelationshipRemoveRequest);
+    QMutexLocker ml(&d->m_mutex);
     return d->m_relationships;
 }
 
@@ -96,6 +102,7 @@
 QMap<int, QContactManager::Error> QContactRelationshipRemoveRequest::errorMap() const
 {
     Q_D(const QContactRelationshipRemoveRequest);
+    QMutexLocker ml(&d->m_mutex);
     return d->m_errors;
 }