[Zope] PDF documents in CMF (1.0)

Hi, I created a new document in my CMF personal folder, and uploaded a PDF file. The MIME type switches to application/pdf. Till now, all's OK. But when I try to open that document later from the CMF (Whatever browser), I'm asked 3 (!) times for a local destination file and the PDF does not open in the Acrobat Reader plugin of the browser as usual (when creating an usual Zope "file" object then upload a PDF file, all's fine). Is it a CMF bug or did I miss something ? --Gilles