That's great to see the first "real" work being started straight away!
However I still think that we should release the first baseline version reflecting Adobe Flex 4.6 code with only cosmetic modifications. It wouldn't make sense to rush such an important feature (Navigators) just to get the release out or to delay the initial release waiting for Navigators to be completed. Having the initial release will also be useful for benchmarking any performance optimizations which we are going to implement. Finally, if Apache Flex 4.6 (or 4.6.1 if you prefer) will be slightly worse than Adobe Flex 4.6 that's OK. That's what we got from Adobe and I can't see any reason why we should try to hide it. Any improvement from that starting point will be our (Apache community) merit. Cheers, Iwo Banas