Mary Tyler Moore had changed her hairstyle beginning with episode 15 (Who Stole My Watch) from the '60s "flip" to wearing it straight and behind her ears. For the flashback portion of this episode, for continuity, her hairstyle should've been "the flip;" since it takes place about ten years before she changed the style; however, it's the new style.
Sally asks Buddy if he's heard of Opelika, Georgia. Opelika is in Alabama. However, she might have said Opa-locka (as the captions on MeTV indicate), which is actually in Florida.
The title is based on the cry of the Texans after the massacre at the Battle of the Alamo, "Remember the Alamo!"