All,
If you pull in the object_transactions plugin described here (http://ryandaigle.com/articles/2007/3/20/what-s-new-in-edge-rails-object-transactions-are-out), it needs the transaction-simple gem, which can be installed using:
gem install transaction-simple
I couldn't find any documentation that did more than hint at this. And there's no dependency management for plugins, so just thought I would share the info.
Hope it helps.
Wes