I think she means a mezuzah. I haven't seen it since I haven't been to DL since it was put up (actually, this is the first I'd heard of it, but thanks for pointing it out! Gotta love the details Disney throws at you....), but the story can be found here if you scroll down a bit
http://www.mouseplanet.com/mailbag/m040826.htm
Boiled down, DL started putting a menorah up in one of the Mail St windows during the holidays. Since the 'home' was Jewish, it needed a mezuzah on the door to go with the backstory.