Comment 17 for bug 91759

I cant open this kind of files...

Just try this, copy this and save it as an .xml file:

<?xml version="1.0" encoding="UTF-8"?>
<?mso-application progid="Excel.Sheet"?>
<Workbook xmlns="urn:schemas-microsoft-com:office:spreadsheet" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:x="urn:schemas-microsoft-com:office:excel" xmlns:x2="http://schemas.microsoft.com/office/excel/2003/xml" xmlns:ss="urn:schemas-microsoft-com:office:spreadsheet" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:html="http://www.w3.org/TR/REC-html40" xmlns:c="urn:schemas-microsoft-com:office:component:spreadsheet">
<OfficeDocumentSettings xmlns="urn:schemas-microsoft-com:office:office">
</OfficeDocumentSettings>
<ExcelWorkbook xmlns="urn:schemas-microsoft-com:office:excel"/>
<ss:Worksheet ss:Name="Sheet1">
<Table>
<Column/>
<Row>
<Cell><Data ss:Type="String">Test1</Data></cell>
<Cell><Data ss:Type="String">Test2</Data></cell>
</Row>
</Table><x:WorksheetOptions/></ss:Worksheet>
</Workbook>

Libreoffice can't open it.

Usong Libreoffice 3.5 on Ubuntu 12.04 fully updated.