Lucas Hofman writes:

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. This almost surely is the "Missing Thread Synchronization Bug". I reported it several month ago (to the list and the collector).

The problem is fixed in Zope 2.2. My collector report contains a patch for Zope 2.1.6, though not an optimal one. Dieter