Bug 178519 Problems in multi-rows header
Please see the attachments.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFRowLM.java
if ( !lm.isFinished( ) )
				{
					return false;
				}
			}
		}
		return true;
	}
	protected boolean hasNextChild( )
	{
		if ( children.size( ) > 0 )
		{
			return !isRowFinished( );
		}
		return true;
	}
	protected boolean isRootEmpty( )
	{
		if ( pageBreakInsideAvoid( ) )
		{
			if ( this.isRowFinished( ) )
			{
				return false;
			}
			if ( !context.isAutoPageBreak( ) )
			{
				return false;
			}
			return true;
		}