diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/adwindow/ADTabpanel.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/adwindow/ADTabpanel.java
index 6ad7a36747..bb5eaf4ec7 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/adwindow/ADTabpanel.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/adwindow/ADTabpanel.java
@@ -668,11 +668,6 @@ DataStatusListener, IADTabpanel, IdSpace, IFieldEditorContainer
     			collapsedGroups.add(group);
     	}
 
-        for (WEditor comp : editors)
-        {
-        	comp.updateLabelStyle();
-        }
-        
         //  Selective
         if (col > 0)
         {
@@ -683,7 +678,12 @@ DataStatusListener, IADTabpanel, IdSpace, IFieldEditorContainer
             			+ columnName + " - Dependents=" + dependants.size());
 			if ( ! (   dependants.size() > 0
 					|| changedField.getCallout().length() > 0
-					|| Core.findCallout(gridTab.getTableName(), columnName).size() > 0)) {
+					|| Core.findCallout(gridTab.getTableName(), columnName).size() > 0)) 
+			{
+				for (WEditor comp : editors)
+				{
+					comp.updateLabelStyle();
+				}
                 return;
             }
         }
@@ -719,6 +719,7 @@ DataStatusListener, IADTabpanel, IdSpace, IFieldEditorContainer
                     comp.setVisible(false);
                 }
             }
+            comp.updateLabelStyle();
         }   //  all components
 
         //hide row if all editor within the row is invisible
diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessParameterPanel.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessParameterPanel.java
index a294ba81f6..f6f11701e3 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessParameterPanel.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/apps/ProcessParameterPanel.java
@@ -101,6 +101,7 @@ public class ProcessParameterPanel extends Panel implements
 		this.width = width;
 		//
 		initComponent();
+		addEventListener("onDynamicDisplay", this);
 	} // ProcessParameterPanel
 
 	private void initComponent() {
@@ -566,6 +567,9 @@ public class ProcessParameterPanel extends Panel implements
     			}
     		}
     	}
+    	else if (event.getName().equals("onDynamicDisplay")) {
+    		dynamicDisplay();
+    	}
 	}
 
 	/**
@@ -623,7 +627,7 @@ public class ProcessParameterPanel extends Panel implements
 		else
 			Env.setContext(Env.getCtx(), m_WindowNo, name, value.toString());
 
-		dynamicDisplay();
+		Events.postEvent("onDynamicDisplay", this, (Object)null);
 	}
 
 	private void dynamicDisplay() {
@@ -653,6 +657,7 @@ public class ProcessParameterPanel extends Panel implements
 					m_wEditors2.get(i).setVisible(false);
 				}
 			}
+			editor.setMandatory(mField.isMandatory(true));
         	editor.updateLabelStyle();
 		}
 	}
diff --git a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WEditor.java b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WEditor.java
index e47d057e3d..7170157386 100644
--- a/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WEditor.java
+++ b/org.adempiere.ui.zk/WEB-INF/src/org/adempiere/webui/editor/WEditor.java
@@ -459,9 +459,14 @@ public abstract class WEditor implements EventListener<Event>, PropertyChangeLis
      */
     public void setMandatory (boolean mandatory)
     {
-        this.mandatory = mandatory;
-        if (label != null)
-        	label.setMandatory(mandatory);
+    	if (this.mandatory != mandatory)
+    	{
+	        this.mandatory = mandatory;
+	        if (label != null)
+	        {
+	        	label.setMandatory(mandatory);
+	        }
+    	}
     }
 
     /**