Update Minecraft 1.8.6, released 25 may 2015-th year, just three days after the previous update 1.8.5.
The only correction that small gothicism, this is the fix for the issue with signs and command blocks. the solution to this problem was stated in a previous update, Minecraft 1.8.5, but it was not complete and did not solve the problem.
It's hard to say how difficult the work of people who look for stable operation of such a massive, blockbuster project like Minecraft. they have to solve hundreds and hundreds of problems to fix dozens of bugs and errors that occur constantly, as the development of the game. It is logical that as new content, which is required to keep tens of millions of fans, and, of course, to attract new ones; optimization of the output and add a variety of custom modifications, and improve the server side of the game, constantly, as if from nowhere, there will be a variety of errors and vulnerabilities. Even just to find them - is not a trivial task, not to mention to fix. For example, the output update Minecraft 1.8.6, was due solely to the fact that the developers failed to deal with a critical vulnerability in a previous update.
Let's hope that the Swedish developers of Majong will continue to refer to their product as responsibly and will not lose its grip and enthusiasm, in order to further develop such a great game like Minecraft.