The public may think digital cinema is perfect but that's not the case. Quite frequently things go wrong such as during an advance screening of the new Brad Pitt movie "The Curious Case of Benjamin Button" when the picture was green and no amount of tweaking could change that. The screening was cancelled.
Other recent snafus include a screening of Steven Soderbergh's Spanish-language "Che" where it played without subtitles for 15 minutes before the showing was cancelled. A few weeks later, subtitles from "Che" played during a screening of "Doubt." In that case, the problem was quickly fixed.
However, digital projection did provide an advantage when a woman became ill during a screening of "Revolutionary Road." After an ambulance took the woman away, the projectionist was able to rewind the film a few minutes so the audience could get the full impact of the film. If it was film, it would have had to be done in real time, delaying the picture even more.
Read more in Variety.