Files didn't get checked out from repository during deployme

I recently deployed to a production server from a development machine
using capistrano and some files failed to get checked out of the
subversion repository, so the deployment ended up being a lemon. I
rolled it back to the previous version, so that’s OK, but I’m still
trying to figure out what happened because everything on the test server
got checked out just fine. The only files I noticed that didn’t get
checked out of the repository for the production deployment were the 3
most recent db/migrate/xxx.rb migration files.
Any ideas?