Rich Text Blocks open in Microsoft Word 2010 in Compatibility Mode

When Microsoft Word 2010 has the 'save files in this format' option set to Word 97-2003 Document (*.doc), new Rich Text Blocks in docx projects get a compatibility flag on save, and open in Compatibility Mode. This causes 2010 features to be disabled. Make sure, if you are working with a docx project, that the 'save files in this format' option of Microsoft Word 2010 is set to Word Document (*.docx). You can find this option in File > Options. In the Word Options select Save.