Send Bug Reports Here writes "In all the fuss over open standards, with Microsoft touting its OOXML in favor of the ISO standard ODF, Microsoft eventually changed its tune to say that there's room in the market for both formats and created an add-in to import ODF files into Word. But just how "committed to interoperability" were they? Of the 12 major features that comprise what most people think of as standard Windows and Office integration, Microsoft's extension supports zero of them. You can't double click ODFs to open them, you can't select ODF via the "save as" dialog, and you have to save new documents as something else before you can convert them to an ODF. In fact, when you open an ODF, it automatically converts it to an OOXML DOCX file, and you have to use the ODF menu (not any of the save menus) to convert it back when you're done. Apparently, some see compatibility as a one-way street."