ASCII codes appear in Excel '03 but not '07

ASCII codes appear in Excel '03 but not '07

Part I - I have a spreadsheet that was from data exported from an application. When I open it, I can see the 'boxes' that usually are from a line break or paragraph break in a cell. IF I view the spreadsheet in my version of excel 2003, I can see them just fine and know where to look to get rid of them, and when they are gone. If I open it on another PC in Excel 2007, I can not see them to even know they are there to cause the problem.