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.
UI/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/internal/ui/dialogs/BindingDialogHelper.java
if ( dialog.getOkButton( ) != null )
				dialog.getOkButton( ).setEnabled( false );
			return;
		}
		if ( this.binding == null )
		
		{
			for ( Iterator iterator = this.bindingHolder.getColumnBindings( )
					.iterator( ); iterator.hasNext( ); )
			{
				ComputedColumnHandle computedColumn = (ComputedColumnHandle) iterator.next( );
				if ( computedColumn.getName( ).equals( txtName.getText( ) ) )
				{
					if ( dialog.getOkButton( ) != null )
						dialog.getOkButton( ).setEnabled( false );
					this.messageLine.setText( Messages.getFormattedString( "BindingDialogHelper.error.nameduplicate", 
							new Object[]{
								txtName.getText( )
							} ) );
					this.messageLine.setImage( PlatformUI.getWorkbench( )
							.getSharedImages( )
							.getImage( ISharedImages.IMG_OBJS_ERROR_TSK ) );
					return;
				}
			}
		}
		this.messageLine.setText( "" ); 
		this.messageLine.setImage( null );
		if ( txtExpression != null
				&& ( txtExpression.getText( ) == null || txtExpression.getText( )