In case any are experiencing this issue:

Support - EOS (SLR) Camera Systems - EOS Digital SLR Cameras - EOS 35mm SLR Cameras - Lenses - Flashes - Digital SLR Camera - EOS 5D Mark II - Service Notices - Canon USA Consumer Products (http://www.usa.canon.com/consumer/controller?act=PgComSmModDisplayAct&fcategoryid=139&modelid=17662&keycode=2112&id=55060)