I have what may be a silly question, but it's been giving me trouble.
My app keeps crashing telling me that it can't find Rails 2.3.4 (which
is what it should run on), despite having put [rails —version '2.3.4']
in my .gems file and Heroku showing that it installs Rails 2.3.4 when
I push my app. Any ideas of what I might be doing wrong?

Thanks.

Here's the relevant part of my Heroku logs:


2011-09-22T20:00:04+00:00 heroku[slugc]: Slug compilation started
2011-09-22T20:01:00+00:00 heroku[api]: Release v5 created by
[email protected]
2011-09-22T20:01:01+00:00 heroku[web.1]: State changed from crashed to
created
2011-09-22T20:01:01+00:00 heroku[web.1]: State changed from created to
starting
2011-09-22T20:01:04+00:00 heroku[slugc]: Slug compilation finished
2011-09-22T20:01:05+00:00 heroku[web.1]: Starting process with command
`thin -p 51853 -e production -R /home/heroku_rack/heroku.ru start`
2011-09-22T20:01:05+00:00 app[web.1]: Missing the Rails 2.3.4 gem.
Please `gem install -v=2.3.4 rails`, update your RAILS_GEM_VERSION
setting in config/environment.rb for the Rails version you do have
installed, or comment out RAILS_GEM_VERSION to use the latest version
installed.
2011-09-22T20:01:05+00:00 heroku[web.1]: Process exited
2011-09-22T20:01:06+00:00 heroku[web.1]: State changed from starting
to crashed
2011-09-22T20:09:29+00:00 heroku[web.1]: State changed from crashed to
created
2011-09-22T20:09:29+00:00 heroku[web.1]: State changed from created to
starting
2011-09-22T20:09:32+00:00 heroku[web.1]: Starting process with command
`thin -p 49351 -e production -R /home/heroku_rack/heroku.ru start`
2011-09-22T20:09:32+00:00 app[web.1]: Missing the Rails 2.3.4 gem.
Please `gem install -v=2.3.4 rails`, update your RAILS_GEM_VERSION
setting in config/environment.rb for the Rails version you do have
installed, or comment out RAILS_GEM_VERSION to use the latest version
installed.
2011-09-22T20:09:32+00:00 heroku[web.1]: Process exited
2011-09-22T20:09:33+00:00 heroku[web.1]: State changed from starting
to crashed

And here's where it shows Rails 2.3.4 being installed:

-----> Heroku receiving push
-----> Ruby/Rails app detected
-----> Configure Rails to log to stdout
       Installing rails_log_stdout... done

-----> Installing gem rails 2.3.4 from http://rubygems.org
       Successfully installed activesupport-2.3.4
       Successfully installed activerecord-2.3.4
       Successfully installed rack-1.0.1
       Successfully installed actionpack-2.3.4
       Successfully installed actionmailer-2.3.4
       Successfully installed activeresource-2.3.4
       Successfully installed rails-2.3.4
       7 gems installed

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