Forum OpenACS Q&A: Response to File upload type
You can also help aolserver by adding mime types in the ns/mimetypes section of your configuration file:
ns_section "ns/mimetypes" ns_param default "*/*" ;# MIME type for unknown extension. ns_param noextension "*/*" ;# MIME type for missing extension. ns_param ".xls" "application/vnd.ms-excel" ns_param ".doc" "application/msword"I don't think MS Office file extensions are included in the default mime types known by aolserver.