Can't Change File Tags On Word 2007 Files

I use tags to keep things organized. I can edit and update the tags on Word 2003 files just fine. But when I try to edit and save them on the newer files I get the following error:I've checked ownership and permissions, they both appear to be set properly, and that gives a different error anyway.I've also noticed that the older Word 2003 files allow for a thumbnail icon of the document, but this doesn't work for 2007 even if the thumbnail box is checked. I can edit the document information inside Word of course, but that doesn't show up in Windows Explorer searches.