I don't get your point. Both releases have nothing in common in terms of release scheduling. Check the Zope 2.7 wiki on dev.zope.org OK, I think I understood, you'll continue supporting 2.6.x till a stable version of 2.7.0 will be released, won't you?
I was a little bit confused because in the past when Zope.org released a new branch they didn't continue developing the previous one and you should migrate to the new one in order to have the latest bug fixes and features. But now because of the impact of the new features, that's what I could guess, they decided to continue maintaining 2.6.x and improving 2.7.x till a stable version is released. So, it is better to continue using 2.6.x for production and 2.7.x for testing, isn't it?
for the new features in 2.7. Zope 2.6 is in the maintenance phase. That means 2.6.X will contain mostly bugfixes but no new features. Btw. bugfixes are usually applied to the current development branch (which is actually Zope 2.7) *and* on the the maintenance branch. Btw. you should read doc/CHANGES.txt Yes, I've already read it, but I didn't find bug Collector #964 on 2.7.0a, but I guess it's because of the schedule differences
Thanks for your reply, it explains some things I didn't understand, Josef