It turns out that the recently posted Service Pack 1 on the
Windows Update web site will cause Outlook and Outlook Express
to think that PDF attachments are unsafe. By default such
attachments can not be viewed or saved. Justifably, if surprisingly,
Office files get the same treatment, so this is not merely sign that
MS is plannng a competing product.
However, it is possible to remove .PDF from the list of
Start|Settings|Control Panel|Folder Options|File Types|PDF|Advanced
and deselect the "Confirm open after download" box. In spite of
the box label, which describes the effect of this option in
Explorer, the effect in Outlook is to allow PDF attachments to
be viewed and saved.
I prefer this to the instructions elsewhere for turning off
this safety feature entirely. That is the advice given on the
MS website, but it suggests that MS consider this only a
"checklist feature" implementation of "secure by default" that
they don't expect to be left in place.
Now if I can only figure out how to get .FOR off the unsafe list.
feenberg at nber dotte org