Factual error: When Diane visits her father in prison, she hands him a pen, but visitors in prison are very closely searched - no way could a visitor give a prisoner a pen of any kind (they're contraband for prisoners as they can be used as weapons), let alone a heavy pen like that one. Even if he were in a minimum-security prison (which his orange jumpsuit seems to indicate he's not) this rule would still apply.
Say Anything... (1989)
1 factual error
Directed by: Cameron Crowe
Starring: John Cusack, Lili Taylor, John Mahoney, Ione Skye
Continuity mistake: When Lloyd calls Diane's house for the first time to ask her out, he gives her father his phone number as 555-1342 (several times), but later when Diane is reading her list of messages, Lloyd's number is listed as 555-2342. (00:12:40 - 00:15:50)
Jim Court: You're not a permanent part of her life. You're a distraction.
Lloyd Dobler: I'm the distraction that's going with her to England, sir.