diff --git a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/core/IManagedOptionValueHandler.java b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/core/IManagedOptionValueHandler.java
index 4bde86408b8..8169754d86f 100644
--- a/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/core/IManagedOptionValueHandler.java
+++ b/build/org.eclipse.cdt.managedbuilder.core/src/org/eclipse/cdt/managedbuilder/core/IManagedOptionValueHandler.java
@@ -38,7 +38,7 @@ public interface IManagedOptionValueHandler{
 	                                        *  button (or the OK button). The valueHandler can 
 	                                        *  transfer the value of the option to its own 
 	                                        *  back-end. */
-	public final int EVENT_LOAD = 5;       /** Posted when the managed build extensions (defined in the manifext files)extension option isThe option has been set by pressing the Apply 
+	public final int EVENT_LOAD = 5;       /** Posted when the managed build extensions (defined in the manifest files) 
 										     *  are loadded.
 										     *  The handler is allowed to adjust the extension elements
 										     */
diff --git a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CConfigurationSpecSettings.java b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CConfigurationSpecSettings.java
index fcb48302b8e..5eff937b25c 100644
--- a/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CConfigurationSpecSettings.java
+++ b/core/org.eclipse.cdt.core/model/org/eclipse/cdt/internal/core/settings/model/CConfigurationSpecSettings.java
@@ -643,6 +643,7 @@ public class CConfigurationSpecSettings implements ICSettingsStorage{
 		if(extRef == null){
 			extRef = createRef(extensionPoint, extension);
 			checkReconsile(extensionPoint, false);
+			fIsModified = true;
 		}
 		return extRef;
 	}
diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptor.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptor.java
index c8ca56bfca9..0317cfd7453 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptor.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptor.java
@@ -147,6 +147,10 @@ public class CConfigBasedDescriptor implements ICDescriptor {
 		return r;
 	}
 	
+	void setDirty(boolean dirty){
+		fIsDirty = dirty;
+	}
+
 	public void updateConfiguration(ICConfigurationDescription des) throws CoreException{
 		fCfgDes = des;
 		fProject = fCfgDes.getProjectDescription().getProject();
diff --git a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptorManager.java b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptorManager.java
index 88cd98c0462..3c0cd8d5e45 100644
--- a/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptorManager.java
+++ b/core/org.eclipse.cdt.core/src/org/eclipse/cdt/internal/core/CConfigBasedDescriptorManager.java
@@ -382,9 +382,10 @@ public class CConfigBasedDescriptorManager implements ICDescriptorManager {
 						//the descriptor was requested while load process
 						des = (CProjectDescription)CProjectDescriptionManager.getInstance().getProjectDescription(des.getProject(), true);
 						ICConfigurationDescription cfgDescription = des.getIndexConfiguration();
-						if(cfgDescription != null)
+						if(cfgDescription != null){
 							dr.updateConfiguration((CConfigurationDescription)cfgDescription);
-						else
+							dr.setDirty(false);
+						} else
 							setLoaddedDescriptor(des, null);
 					}
 				}
@@ -454,6 +455,7 @@ public class CConfigBasedDescriptorManager implements ICDescriptorManager {
 					CProjectDescription writableDes = (CProjectDescription)CProjectDescriptionManager.getInstance().getProjectDescription(event.getProject(), true);
 					ICConfigurationDescription indexCfg = writableDes.getIndexConfiguration();
 					dr.updateConfiguration((CConfigurationDescription)indexCfg);
+					dr.setDirty(false);
 				}
 				if(desEvent != null){
 					notifyListeners(desEvent);