diff -r 5dc02b23752f -r 3e2da88830cd tools/designer/src/lib/shared/qdesigner_propertysheet.cpp
--- a/tools/designer/src/lib/shared/qdesigner_propertysheet.cpp	Tue Jul 06 15:10:48 2010 +0300
+++ b/tools/designer/src/lib/shared/qdesigner_propertysheet.cpp	Wed Aug 18 10:37:55 2010 +0300
@@ -693,6 +693,10 @@
 
 bool QDesignerPropertySheet::canAddDynamicProperty(const QString &propName) const
 {
+    // used internally
+    if (propName == QLatin1String("database") ||
+        propName == QLatin1String("buttonGroupId"))
+        return false;
     const int index = d->m_meta->indexOfProperty(propName);
     if (index != -1)
         return false; // property already exists and is not a dynamic one