- LibreOffice 3.5 writes valid ODF 1.2
- Microsoft Office only officially supports ODF 1.1 and complains that ODF 1.2 and ODF 1.2 extended documents written by LibreOffice 3.5 are invalid.
- The warning from Microsoft Office can be safely ignored, and the "Repair" option will import the document.
- For users that find this annoying, a workaround is to open Tools->Options->Load/Save->General and set "ODF format version" to "1.0/1.1". However, please note that this will cause some information to be lost when storing documents.
Date: June, 2009http://blogs.msdn.com/b/dmahugh/archive/2009/06/14/testing-office-s-odf-implementation.aspx