Bug 198270 Copying an aggregate does not make a copy, only a reference
In a table with groups or multiple columns, create an aggregate in a footer or a header. Copy the aggregate to another cell in a footer or a header. Make changes to the new aggregate appropriate to its new location. Expected result: The changes appear in only the new copy of the aggregate. Actual result: The changes appear in both aggregates because the new aggregate is not a copy, but a reference to the same aggregate as the original.
xtab/org.eclipse.birt.report.item.crosstab.ui/src/org/eclipse/birt/report/item/crosstab/internal/ui/dialogs/CrosstabBindingDialogHelper.java
else if ( getDataItemContainer( ) instanceof AggregationCellHandle )
			{
				AggregationCellHandle cellHandle = (AggregationCellHandle) getDataItemContainer( );
				if ( cellHandle.getAggregationOnRow( ) != null )
				{
					aggstr += cellHandle.getAggregationOnRow( ).getFullName( );
					if ( cellHandle.getAggregationOnColumn( ) != null )
					{
						aggstr += ",";
					}
				}
				if ( cellHandle.getAggregationOnColumn( ) != null )
				{
					aggstr += cellHandle.getAggregationOnColumn( )
							.getFullName( );
				}
			}
			for ( int j = 0; j < aggOns.length; j++ )
			{
				if ( aggOns[j].equals( aggstr ) )
				{
					cmbAggOn.select( j );
					return;
				}
			}
			cmbAggOn.select( 0 );
		}
		catch ( ExtendedElementException e )
		{
			ExceptionHandler.handle( e );