Lookout (now owned by Microsoft) complaining about interop assemblies used by other add-ins.

[Kenneth Myhra]

Hi all!
I am creating an add-in for Outlook. It should be supposed to work with
OL2000, OL2002 and OL2003. My first beta release was divided into three
setup files, one for OL2000, one for OL2002 and one for OL2003. This is ok,
since my goal was to create a conditional setup later which had the three
different interop dll's, and installed the appropiate one after checking the
office version.
But then some of my users using Lookout complained about Lookout not working
anymore and displaying a message blaming some other add-in for it, this
turned out to be my add-in. The user was using Outlook 2003. I then checked
the GAC and saw that there was installed a version of the interop libraries
for the outlook 2002 version, this interop had been installed by Lookout.
My add-in used the Office 2003 PIA's. After checking the link that Lookout
displayed in its messagebox
(http://www.lookoutsoft.com/forums/topic.asp?topic_id=10), I got the feeling
that it was wrong to use the Office 2003 PIA's. But when looking at this
knowledgebase article http://support.microsoft.com/?id=840585 , my
impression is that I should not use the Office XP PIA in an Office 2003
environment.
So my question is then, which one of those links are explaining this the
correct way?

Thanks,
Kenneth Myhra