Bug 118644 Hint for Date Time Parameters
The hint you give for date time parameters (Please enter date ... pattern: MM/DD/YYYY ....) is only true if the date is unformatted. If you apply a format, you must enter it according to it. So it's quite confusing!
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/ui/dialogs/ParameterDialog.java
public void dispose( )
		{
		}
		public boolean isLabelProperty( Object element, String property )
		{
			return false;
		}
		public void removeListener( ILabelProviderListener listener )
		{
		}
	};
	private ICellModifier cellModifier = new ICellModifier( ) {
		public boolean canModify( Object element, String property )
		{
			if ( property == null
					|| ( element == dummyChoice && !COLUMN_VALUE.equals( property ) ) )
			{
				return false;
			}
			return true;
		}
		public Object getValue( Object element, String property )
		{
			SelectionChoice choice = ( (SelectionChoice) element );
			if ( choice == dummyChoice )
			{
				return ""; 
			}