Please see https://releases.xamarin.com/stable-release-15-2/ for the details about this release, including the steps to update or downgrade as needed.
Please file a quick bug report using the "15.2 Release" new bug form if you see any suspicious behavior in these versions that you wish to report.
You can also check the list of issues reported by users so far for the 15.2 Stable channel versions to see if any match. If you find a match, feel free to CC yourself on the bug report as a way to tally your interest in the bug:
(If you have reported an issue that is specific to the latest 15.2 release but is not yet included in the list, the bug might not have been filed using the "15.2 Release" new bug form. Those bugs will be added to the 15.2 list as they are reviewed by the team.)
Comment in this forum thread if your question is not related to a suspicious behavior after download, but instead one of the following:
A release blog entry is now posted with an in-progress list of some of the top issues being tracked by the Xamarin team related to the Xamarin 15.2 release. See the post for additional details:
EDIT May 15: Add a list of commonly seen issues for the 15.2 release so far as well as information about the switch from
EDIT May 16: Update wording for Bug 56213 to mention alternate symptom involving breakpoints on device.
EDIT May 17: Move the details about the list of commonly seen issues onto the release blog for visibility and tidiness.
EDIT May 18: Restore the Release Blog links now that the release blog is back up.
EDIT May 23: Adjust title for latest release.