Sad irony that the showing of a movie set almost entirely underwater has to be postponed BECAUSE of water … but … well … wouldn’t be too pleasant with soggy equipment, moviegoers, and concessions. So we’ve just confirmed that tonight’s showing of “Finding Nemo” is CANCELED. Philip Borgnes of Sidewalk Cinema tells us “Nemo” is being rescheduled to Thursday, August 21st; meantime, “Ghostbusters” is scheduled next Saturday (8/16) and “Galaxy Quest” the Saturday after that (8/23).