Using Tolk under a Rails 2.3.5 app, there is an error message from translation.rb "The translation should contain the variables..." that isn't being displayed. Instead clicking "Save changes" just refreshes the form with empty fields and nothing saved.
This warning is in the logs:
/vendor/plugins/tolk/app/models/tolk/translation.rb:115: warning: default `to_a' will be obsolete
This issue is still present , you can now find it here : tolk/tolk#6