diff -r cc75c76972ee -r c0432d11811c doc/src/classes/phonon-api.qdoc
--- a/doc/src/classes/phonon-api.qdoc	Wed Apr 21 12:15:23 2010 +0300
+++ b/doc/src/classes/phonon-api.qdoc	Wed Apr 21 20:15:53 2010 +0300
@@ -1651,6 +1651,16 @@
     playback of the current source, but it is possible to try with a
     different one. A user readable error message is given by
     errorString().
+    \section1 Symbian Platform Security Requirements
+
+    On Symbian, processes which access media via the network must
+    have the \c NetworkServices platform security capability. If the client
+    process lacks this capability, operations will result in errors.
+    This failure is indicated by a state() of Phonon::ErrorState.
+
+    Platform security capabilities are added via the
+    \l{qmake-variable-reference.html#target-capability}{TARGET.CAPABILITY}
+    qmake variable.
 
     \sa Phonon::MediaSource, Phonon::AudioOutput, VideoWidget,
     {Music Player Example}, {Phonon Overview}, Phonon::VideoPlayer,