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Please use this unofficial build for intensive tests, but be careful, create a backup of your User Profile before you start!
Most functions work fine for me, but:
Only for testing, you will use those builds on your own risk.
Comments with first test results appreciated!
Addendum
False Alarm
Adrian Kalla told me that I was rash, Build-ID is 20160120202951. I thought that I might already have seen a build 4 several weeks ago, but I saw much activity of :ewong the last 24 hours, and so that I became reckless … sigh