Index: CruiseObjectSourceInitializer.cs
===================================================================
--- CruiseObjectSourceInitializer.cs	(revision 4045)
+++ CruiseObjectSourceInitializer.cs	(working copy)
@@ -102,6 +102,7 @@
 
 			foreach (IBuildPlugin plugin in pluginConfig.BuildPlugins)
 			{
+        if (plugin != null)
 				foreach (INamedAction action in plugin.NamedActions)
 				{
 				    objectionManager.AddInstanceForName(action.ActionName + "_CONDITIONAL_GET_FINGERPRINT_CHAIN", action.Action)