When will be a good time to start reporting bugs & pull requests to jQuery 2.0?

I'm quite interested in a good quality of jQuery 2.0, especially that I'm happy enough to recently work mostly on projects not supporting IE<9. I wish to know when will be a good time to start tracking potential bugs and report pull requests to the code base? I'm asking because work on this version seems to just have started and I wouldn't like to duplicate your in-progress effort.