Bug 152560 PDF doesn't display bottom Border in inner group footer properly
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/layout/pdf/PDFTableLM.java
removeDropCells(removedDropCells);
			}
		}
		lastRowContent = currentRowContent;
		lastRow = currentRow;
		currentRowContent = newRowContent;
		currentRow = new RowWrapper( row, currentRowID );
	}
	
	protected void removeDropCells(ArrayList list)
	{
		int maxHeight = 0;
		Iterator iter = dropList.iterator( );
		ArrayList removedList = new ArrayList();
		while ( iter.hasNext( ) )
		{
			DropCellInfo dropCell = (DropCellInfo) iter.next( );
			int columnID = dropCell.cell.getColumnID( );
			if(list.contains( new Integer(columnID) ))
			{
				verticalAlign( dropCell.cell );
				iter.remove( );
				maxHeight = Math.max( maxHeight, dropCell.leftHeight );
				removedList.add( dropCell);
				
			}
		}
		iter = dropList.iterator();
		while(iter.hasNext())
		{