I might be missing something very basic here, but push operations on an instance of Ember.Array() are not getting observed at all:
[JSBin] [Release] - http://emberjs.jsbin.com/kaqigiqoce/1/edit?html,js,console,output
[JSBin] [Beta] - http://emberjs.jsbin.com/navizemolu/1/edit?html,js,console,output
[JSBin] [Canary] - http://emberjs.jsbin.com/wacikereda/1/edit
Can someone explain what’s wrong here?