From Joe Taylor, K1JT:
To: Users of FT8
From: WSJT Development Team
Subject: IMPORTANT NOTICE ABOUT EXPERIMENTAL MODE FT8
The planned protocol change in FT8 is now complete and tested. Effective at 0000 UTC on July 8, 2017, you should stop using FT8 with any WSJT-X code revision earlier than r7805.
If you are building WSJT-X for yourself from source code, on July 8 or later you may upgrade to the latest code revision and recompile. You will then have access to the latest version of FT8.
If you are waiting for pre-built installation packages: We plan to post a release candidate for WSJT-X v1.8.0-rc1 configured for Windows, Linux, and OS X very soon — probably early next week. Thanks for your patience.
— 73, Joe, K1JT (for the WSJT Development Team)