Apparantly, someone was able to take pictures from the set...
That has a Crossed-Out Autobot Symbol with the words "GO HOME" underneath it .
First Behind The Scenes Video From Transformers 3
Source:TFW2005
Note: This link also had a Youtube Video that has had a copyright claim by Paramount .. even though some a saying a Bogus claim
TF3 DMCA Takedown Notice Getting Attention
Source:transformerslive.blogspot