diff -r 4927282092b4 -r c1a7ca8407fe calendarengines/caldav/src/caldavengine.cpp
--- a/calendarengines/caldav/src/caldavengine.cpp	Fri Feb 05 10:16:42 2010 +0100
+++ b/calendarengines/caldav/src/caldavengine.cpp	Mon Feb 15 16:38:49 2010 +0100
@@ -1669,6 +1669,11 @@
 			// someone deleted this already
 			Ret = KErrGeneral;
 			}
+		else if (Return == FORBIDDEN)
+			{
+			// event read-only
+			Ret = KErrGeneral;
+			}
 		else
 			{
 			Ret = KErrGeneral;