Canonical developers are on fire and they just managed to promote yet another image of Ubuntu Touch, this time also implementing a few very important features.
Ubuntu Touch has had some problems, but its developers managed to overcome the obstacles and to promoted a new stable image.
According to the announcement, a fix has been implemented for the a qmlscene crash (this problem was blocking applications that failed on startup to be able to register a surface on Mir).
Also, a new version of Unity8 has been implemented, bringing more support for the incoming scope preview work and a number of webapps container bug fixes have been implemented.
Canonical performs a series of automated and manual tests (thank you Alan Pope for this info) that allow it to only release bug-free versions of Ubuntu Touch, as much as humanly possible.