mime magic & MS word docs

hi all, I was just wondering if anyone has had any success using mime_magic to guess the content type of MS Word documents..? The extension works for gif's & jpeg's, but mime_content_type() returns "text/plain" for Word and Excel docs. I'm using php 5.0.4 on Windows, and the mime.magic file that's bundled with php. I tried switching on the mime_magic debugging. It complained about a lot of entries in the mime.magic file, saying that they weren't proper mime types, but not the MS document type entries AFAICS any help much appreciated Rob