--- a/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/CDebugCorePlugin.java	Thu Aug 13 17:09:55 2009 -0500
+++ b/cdt/cdt_6_0_x/org.eclipse.cdt.debug.core/src/org/eclipse/cdt/debug/core/CDebugCorePlugin.java	Mon Aug 17 15:51:45 2009 -0500
@@ -354,6 +354,8 @@
 			fCommonSourceLookupDirector = new CommonSourceLookupDirector();
 			String newMemento = CDebugCorePlugin.getDefault().getPluginPreferences().getString( ICDebugInternalConstants.PREF_COMMON_SOURCE_CONTAINERS );
 			if ( newMemento.length() == 0 ) {
+				fCommonSourceLookupDirector.initializeParticipants();
+
 				// Convert source locations to source containers
 				convertSourceLocations( fCommonSourceLookupDirector );
 			}