Running all tests is broken

If you run all tests, you get broken tests that aren't actually broken. This is due to static caching in functions. chx is trying to fix the underlying issue here: http://drupal.org/node/254491 So I'm opening this and immediately marking it postponed depending on the outcome of that issue, in the hope that people will see it and know what the problem is.

I spent a good hour or two wondering why one of the registry followup patches was fixing broken tests and other weirdness, hopefully this issue will save you from that experience.

Therefore, at the moment, don't use 'run all tests' to see if your patch breaks anything. Run the specific test you need, or run them all individually (or in groups).