I have rooted Acer Iconia A100, running HC (3.2.1), with build number Acer_A100_2.013.02_COM_GEN2, and received notice of system updates this morning. First, was the smaller update, which was applied successfully. Then, the larger (~165MB), which downloaded, and attempted installation, only to see Andy with the large Triangle of Doom on his chest. System rebooted, and when I got past the unlock screen, system message said simply, "Update failed."
Any others with this failure? Any suggestions? Do I need to unroot prior to the update?