Talks between the Screen Actors Guild and the American Federation of Television and Radio Artists are still working to resolve key issues before Saturday's deadline, The Associated Press reports. Details of the talks are not known since both sides have imposed a news blackout. Some of the key issues include residuals and pay for middle-class actors, which make up the majority of the guild. A breakdown in talks could trigger a strike that would devastate the Los Angeles-area economy and cost billions of dollars in revenues. Some studios are speeding up production on films in the event of a possible walk walkout. Steven Spielberg was noticeably absent from much of the press tour for A.I. in order to wrap his current project starring Tom Cruise. Fall TV shows, which normally begin filming in the summer also could be affected by a possible strike.