This thread has now been closed to direct all further updates about this release onto the latest announcement:
Reason for release: Preview of the upcoming Cycle 6 feature release, in particular to gather as many additional customer bug reports as possible. (See the release blog and "Xamarin Release Cycles" for more information about "Cycles" and "Service Releases.")
Date published: See https://releases.xamarin.com/.
NOTE: These Alpha versions have some known open bugs, and they have not yet completed the full suite of tests by the Xamarin QA team. The reason for this release is to gather as many additional customer bug reports as possible. (See also guideline #2 below.)
You can downgrade back to the current Stable version by switching updater channels.
This first post will be updated regularly.
If you find a new problem that is specific to this version:
a. If you can share some specific error messages or can reproduce the problem consistently, please email the information you have so far to
b. If you only have a general description of the problem, you can post it directly on this forum thread so that hopefully a member of the Xamarin team or another user will recognize it and be able to help fill in some details.
EDIT Sep 02: Update for new Alpha build version numbers.
EDIT Sep 10: Adjust the "guidelines" to mention
EDIT Sep 21: Update for Sep 18's new Alpha builds.
EDIT Sep 24: Update for new Alpha builds.