Okay @tfraley @SimonQ, whether you want to execute the following or not is up to you (esp. @tfraley, since your forum is up and running, and you probably don't want to mess around with it)
Long story short, when I launched v0.7.1, I re-wrote part of the git history, which is a big no-no. I've re-launched it properly now, but you guys have probably reset your working copies to the altered history, so we'll need to fix that.
Re-run the commands I told you to run earlier. For reference, here they are again:
$ git checkout v0.7.x # get to the v0.7.x branch
$ git fetch # grab the latest history from GitHub
$ git reset --hard origin/v0.7.x # update your local copy to match
$ npm i # install any missing dependencies
$ ./nodebb upgrade # execute upgrade script