[Zope] Zope and mime types ???

Hi, I have a problem with Zope and mime types. I have Zope 2.4.1 running behind Apache web server and the product I use is the DocumentLibrary. Th DL determines the type of document by analyzing the content type. When I upload a Word document from a machine where Word is installed the correct type 'application/msword' is found. But uploading the same file from a PC without a Word installation the 'application/octet-stream' type is determined. Now I am totally confused about content types and mime types. I hope some can answer the following questions: 1. Is this a normal behaviour? 2. How does Zope determine the content / mime type? 3. How does Zope determine the content / mime type when running behind Apache? TIA Frank