office 2007 的 docx 還不是完全標準的 ooxml

http://bit.ly/T8BAyX

Starting with Microsoft Office 2007, the Office Open XML file formats have become the default[3] target file format of Microsoft Office,[4][5] although the Strict variant of the standard is not yet fully supported.[6] Microsoft Office 2010 provides read support for ECMA-376, read/write support for ISO/IEC 29500 Transitional, and read support for ISO/IEC 29500 Strict.[7] Microsoft has stated that Microsoft Office 2013 will support both read and write of ISO/IEC 29500 Strict.[8]