I'm having trouble getting the mapping of custom properties to work properly for MS word .docx documents. I have "CustomProperty" listed in the block name and "doc, xls, ppt, pub, dot, xps, docm, xlsm, pptm, mpp, vsd, docx, xlsx, pptx, mppx, msg, pubm, pubx" in the file extension list. The mappings work just fine for Excel files and PowerPoint files and even for .doc files, but not for .docx files. Any ideas? I've already checked and re-checked that docx is in the file extension list.