Bug 142104 Cannot place data set field on master page
Bugzilla 122419 says this is fixed. I am using RC2, and I can't insert a data set field in the master page header or footer.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dnd/InsertInLayoutUtil.java
DesignElementHandle handle = (DesignElementHandle) target.getParent( )
					.getModel( );
			if ( handle instanceof ReportItemHandle )
			{
				ReportItemHandle bindingHolder = DEUtil.getListingContainer( handle );
				DataSetHandle dataSet = DEUtil.getFirstDataSet( handle );
				return dataSet == null
						&& ( bindingHolder == null || !bindingHolder.getColumnBindings( )
								.iterator( )
								.hasNext( ) )
						|| insertObj.getElementHandle( ).equals( dataSet );
			}
		}
		return false;
	}
	/**
	 * Validates drop target from scalar parameter in data view.
	 * 
	 * @return validate result
	 */
	protected static boolean handleValidateParameter( EditPart target )
	{
		return handleValidateParameterDropContainer( target )
				&& DNDUtil.handleValidateTargetCanContainType( target.getModel( ),
						ReportDesignConstants.DATA_ITEM );
	}
	/**
	 * Validates drag source from data view to layout. Support the multiple.
	 * 
	 * @return validate result