After a bit of confusion, I realized that after running Postgres.app [postgresapp.com] for a local PostgreSQL instance on OSX, that I was no longer able to run pg_dump for creating a local backup of my database.
The error I was running into was something like:
pg_dump: server version: 9.2.1; pg_dump version: 9.1.6
pg_dump: aborting because of server version mismatch
To fix this error, I had to edit my local bash profile (pico ~/.bash_profile) and add the following entries:
The only change you may have to do is fix the path to your Postgres.app installation if you installed it to some place other than your /Applications folder.
Hope this helps someone else running into errors trying to utilize pg_dump or other postgres utilities!