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
{
	/**
	 * Rule interface for defining insertion rule
	 */
	abstract static interface InsertInLayoutRule
	{
		public boolean canInsert( );
		public Object getInsertPosition( );
		public void insert( Object object ) throws SemanticException;
	}
	/**
	 * 
	 * Rule for inserting label after inserting data set column
	 */
	static class LabelAddRule implements InsertInLayoutRule