Ver. 3.5.6.2 doesn't show update for ver. 4

Why doesn’t ver. 3.5.6.2 show ver. 4 as an update when clicking check for update?

Because according to release plan https://wiki.documentfoundation.org/ReleasePlan there must be a 3.6.6 version, planned to be released in Apr 8 - Apr 14, 2013