* Ordering constraints based on the JMock constraints with the same names.
* Configurable warnings or errors when e.g. a non-existent method is stubbed.
* More readable & complete list of both unsatisfied & satisfied expectations.
* New parameter matchers e.g. match optional parameters.
* Nesting of parameter matchers.
* A syntax shortcut for adding multiple expectations.
* Tested with Ruby 1.8.4, 1.8.5, 1.8.6 & 1.9.
* Tested with Rails 1.2.3 & Rails 2.1.0.
* Various bug fixes.