From reading the change log and just the timing I thought that RSpec 1.1.1 worked with Rails 2.0. A few test failed but some of them were clearly bit rot, tests that had not been updated as I added and changed functionality. However others were more problematic. One of the fixtures is not loading at all. It’s unclear how it is different from the others. Running the tests twice in a row gave different failures. Running the tests with rake and with script/spec gave different failures.
One problem I just noticed with RSpec is that is hard or impossible to run individual tests within a file or even individual spec files. I don’t currently have any view tests or stories, so I plan to follow the examples and write a few. That should tell me if I am using obsolete features or what.