Character mistake: When Jenny McCarthy goes to the office to meet the director. She's calling out his name to see if he's there & calls " Roman.......Ronin.......Roman". (00:23:15)
Character mistake: Stone catches Gale snooping around and Dewey takes her aside to the kitchen to have a chat. She updates him about the latest news in the investigation, "Sarah's call didn't come from his cell phone." However Courteney Cox mangles the name and calls her "Sterra." Noticed by Wes Craven in the DVD commentary track; he even identifies the scene with "Oh, this is the scene when she calls Sarah 'Sterra' "and the editor references the similar "Roman=Ronan" mistake that happened earlier. (00:40:20)
Answer: Not expressly, though it could have been the date of some significant event (December of 1988) but someone as security-conscious as Sydney now is wouldn't be stupid enough to have her code be something that could be guessed.