github/ReactiveCocoa — pull request #284 by joshaber (2013-01-10 22:36:11+00:00)
Title: Fix notification cycle

_Depends on #283_

The notification signal kept a strong ref to the notification object. That means you'd end up with a retain cycle if you observed a notification on `self`. Especially relevant in light of RCL: https://github.com/github/ReactiveCocoaLayout/blob/master/ReactiveCocoaLayout/NSView+RCLGeometryAdditions.m#L97