New Post: Format Error by opening File in Excel 2010 generated with ExcelWriter2007

Hi,

I developed a little export function by using PHPExcel latest version 1.7.9
The problem is that I have in a column data values which looks like

12345.10
12345.B

Generating the excel table by using SetCellValue() setting the format by getStyle()->getNumberFormat()->setFormatCode() seems to convert the dot to comma, so when opening the generated file the values are looking that way:

12345,10
12345,B

I used the IOFactory.php and also the PHPExcel_Writer_Excel2007 to instanciate a writer for excel 2007 but open it in Excel 2010.
Is this a possible failure or do I something wrong?

Many thanks