"There will not be a 'compatibilty' list for X2.2, simply because there are a lot of modules out there that would need to be checked on all kinds of platforms under all kinds of circumstances. Too big a task.
However, there will be a document explaining the changes made to X2.2, where compatibility could be an issue. This means it will explain the proper use of the X2.2 API, especially where there have been changes compared with X2.0.x."
in his response that that would have answered your question. I guess I misunderstood the question.
Peter