No natural iron golem spawns

What I expected:
Iron golems spawning with more then 50 villagers and more then 100 doors,

The doors were counting towards a house, and the villagers were first bred, later added with spawners when I had around 30

Now I expected the golems to spawn when I waited for 5 hours, however I never found one, or even heard one underground like I had to when it was still 1.2.13.5.
Even so, they no longer seem to spawn, and the villagers were spawning in a world I created since I got the beta update, meaning I didn't use an older world, and yet there are no golems spawning naturally.

Please fix this as this might also effect iron farms more then the previous bug we faced.

Hope to hear from you soon, or see the fix standing in the next update,

StrategyMamber