numpy/numpy — pull request #361 by njsmith (2012-07-17 15:57:50+00:00)
Title: Switch WARN_ON_WRITE to issuing FutureWarnings instead of DeprecationWarnings

FutureWarnings are displayed by default, so they should be used
whenever a future change will change the semantics of existing code
(as opposed to making existing code simply stop working).

List discussion:
http://www.mail-archive.com/numpy-discussion@scipy.org/msg37500.html