Ruby/PgSQL error on Rails start : cannot load such file -- pg_ext (LoadError)

Question

I'm new to Ruby (coming from a Java background) and was given access to a RoR project from a Git repository. I was able to get Ruby built with rbenv and Postgres installed via homebrew, installed the "pg" gem using the correct flags. Any ways I did "bundle install" on the project and it created a bundle, when I went to start the server:... any help will be definitely appreciated!

$ rails s
/Users//Projects/The /vendor/bundle/gems/pg-0.14.1/lib/pg.rb:4:in require': cannot load such file -- pg_ext (LoadError)

from /Users//Projects/The Usic/vendor/bundle/gems/pg-0.14.1/lib/pg.rb:4:in <top (required)>'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:72:in require'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:72:in block (2 levels) in require'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:70:in each'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:70:in block in require'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:59:in each'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler/runtime.rb:59:in require'

from /Users//.rbenv/versions/1.9.3-p392/lib/ruby/gems/1.9.1/gems/bundler-1.3.0/lib/bundler.rb:132:in require'

Answer 1

Issue also appears in Fedora 17.

Uninstall "pg" gem:

gem uninstall pg

Run bundle (assuming Gemfile contains "pg" gem):

bundle