Forestry has a known issue with a known cause that can kill a server (placing the saplings in a diamond chest or tubes, as these devices strip some data aparently). It can be avoided extremely easily by a user who knows about it, and the server crash can be avoided easily by a server admin who changes a config. Segnir has not made it the default config since it can cause you to lose bee and tree progress if something else causes problems. In all honesty FTB should not have updated forestry until the bug was fixed, but it is not something that "a single test" would have revealed, so the drama mongering by some members of the community is a bit much.