First off, thanks to Kris and Mel for the previous definitive answers.
Let me see if I can summarize this correctly...
1) It's important that administrators who are taking advantage of
pre-compiled packages (like me) use packages that have been compiled for
their particular base system.
2)
Here's one thing I've never quite understood about FreeBSD and I was
hoping somebody could provide some enlightenment...
I've got 6.2-release installed.
By default (as you all probably know) pkg_add -r fetches packages from
the release directory: