I stopped by on my way home on Sunday (9/27) and didn't see it either.
How funny! I only spotted the most obvious one (the Mickey pumpkin) and by accident there appears to be another one captured in the photos.

I have another trip planned with some other folk and so I hope to get back and check out the tree again (and this time, I'll be looking for the Hidden Mickeys).
Awesome! I also have the photos (posted earlier in this thread) in my (Figment's) Halloween trip report, but hopefully I'll get some news ones too!