[evince] ev_document_factory_get_document not loading pdf file

[Richard Shann <richard shann virgin net>]

Running GNU/Denemo on Mac OSX we use ev_document_factory_get_document()
to load a pdf file. On this platform (only) the call fails with the
message

File type application/octet-stream type (application/octet-stream) is
not supported

Can anyone suggest what might be wrong? The call is working fine on
GNU/Linux and on Windows.

Richard Shann