Couldn't resist this one!
FWIW - I have PrimoPDF 3.1.0.2 running in VPC 7, Win XP & using Pub 2007 I
can generate a pdf (4-page newsletter), drag it to my Mac desktop,
double-click it & it opens perfectly in Preview without a hitch. (OS X
10.4.8, PowerMac G5).
Although it isn't possible to resolve the issue based on the minimal info
supplied in your post, it can be unequivocally stated that there is *no*
inherent compatibility problem with PrimoPDF & Macs. Without knowing more
about what you're vaguely referring to as "a problem" I can only guess that
the attachment is actually getting mangled by the security blackguards in
the Exchange Server setup... although any number of other possibilities
exist - including something as innocuous as a font issue.
As a test, try zipping the Pub before sending it out in order to shield it
from the Dark Side's executioners & see if it arrives in a more usable
form

Let us know what the results are so others might benefit if it works.
If not, please provide as much additional detail as you can about the
problem, the process as well as the systems involved. I'll be happy to take
a look at one of the files if necessary.
Regards |:>)
Bob Jones
[MVP] Office:Mac
P.S. - The only obstacle to peaceful coexistence is the mindset of certain
users (on _both_ sides of the street). Don't expect the number of
Macs-in-use to do anything but _increase_ over the next few years
