Comment 20 for bug 1302251

Here is the list of file extensions for MS Office documents

Word: doc, dot, docx, docm, dotx, dotm
Excel: xls, xlt, xlm, xlsx, xlsm, xltx, xltm, xlsb, xla, xlam, xll, xlw
PowerPoint: ppt, pot, pps, pptx, pptm, potx potm, ppam, ppsx, ppsm, sldx, sldm

We need to correct the file mime type of these files in existing database.