I've just pushed updated packages for 9.0 and 9.1. These fix the
"fsync permissions bug":
https://wiki.postgresql.org/wiki/May_2015_Fsync_Permissions_Bug
9.2..9.4 are affected as well, but not as badly in the default Debian
setup, because they don't have the SSL certificate symlinks in the
data directory anymore.
All branches including 9.0/9.1 will get another update shortly when
the new minor release are officially released.
Christoph
--
cb(at)df7cb(dot)de | http://www.df7cb.de/