Upgrade from 9.1 to 10.1 broke my ports

[Stephen Cook]

Hello!

I recently used freebsd-update to upgrade my hosted FreeBSD box (well, 
VPS) from 9.1-RELEASE to 10.1-RELEASE.

One of the steps is to update any ports installed, before running 
"freebsd-update install" again. However, it seems that any ports I had 
installed are forgotten. That is, I can still use the programs 
themselves, but portmaster, pkg info, etc all think there are none 
installed. So, I can't update or uninstall them.

Any ideas how I can fix this? Thanks!

-- Stephen