Is anyone else having troubles growing huge mushrooms since the bugfix in 1.2.4?

Even trying to grow them in the dead of night they don't seem to like being placed.

I've tried sealing a small room around a spot, placing the mushroom (which works in pitch black) and then removing the room and trying to bonemeal the shroom up, but this doesn't work.

Any ideas? I understand that they're -supposed- to not be placed it light, but it's hurting my ability to create nice-looking parasols for my mansion's patio, and damnit that's the real issue at hand!