Then you seem to have missed the other update: openHAB 3.1 Milestone Builds - #4 by Kai - all fine, it is safe to use.
But you are right that Milestone 3 is due right now. There was quite some activity on code this weekend and there are a few PRs that should still be merged before Milestone 3, therefore we didn’t build it yesterday. I’d hope that this Thursday or Friday might be a good moment for it - you should have it for Easter 
.