a) do not do anything :) in case we need emergency rebuild next week
b) use care if you are using one of the "R4_HEAD" projects; until we have renamed remaining R4_HEAD branches (approx. 6/27?) Bug 378876 - change remaining 3 R4_HEAD repository branches to master c) do tag your released code with "annotated tag" (e.g. R4_2_0, R3_8_0)