[Zope] intermittent problems downloading portal files

[Lucas Hofman]

We use PTK as an intranet for a R&D company. Users publish their reports
as in PDF format using portal file object type. 

Now and then (enough to be irritating, but not reproducable on demand)
the PDF file gets corrupted in the download, resulting in the reader
complaining (typically "file does not start with %PDF...")

The server runs linux (mandrake 7), Zserver2.1.6, Zope 2.1.6 and PTK
0.7.1
The clients are heterogenous, IE5, Netscape 4.x on both PC and
workstations.

Anybody a clue what can cause this?

-- 
Lucas Hofman
PGS Seres                                        tel: +47 67514059
PO Box 354                                       fax: +47 67526640
N-1324 Lysaker, Norway