Evgeni (mainly) has been busy to improve stats.distributions stats.distributions is on the way to losing it's remaining bugs in higher moments and entropy. :( and is getting a reliable test suite for them. Here is a, maybe incomplete, list to see if we want to backport any of them to 0.13 https://github.com/scipy/scipy/pull/2801 fix beta_gen.fit (Warren) https://github.com/scipy/scipy/pull/2845 open, numerical improvemnt (but also vonmises_line) https://github.com/scipy/scipy/pull/2774 open, bugfix for entropy docs https://github.com/scipy/scipy/pull/2814 not bugfix https://github.com/scipy/scipy/pull/2822 speed improvement https://github.com/scipy/scipy/pull/2841 numerical improvements not ready https://github.com/scipy/scipy/pull/2821 fixing moments https://github.com/scipy/scipy/pull/2790 Josef