Reference material (I won't extract the relevent portions so it's up to you.)
http://club.cdfreaks.com/showthread.php?t=161891 notes where the users dupe the DVD and cause the issue.
If I play a movie on my computer, if the movie has subtitles, they can't be turned off. I can switch the language if there are multiple languages, I can turn on/off captions, but the subtitles will not turn off. This happens with Windows Media Player as well as Interactual and Ulead players. I have tested about a dozen DVDs and they all behave identically except Star Wars. Odd. They play correctly (i.e., without subtitles) on my dedicated DVD player in my home entertainment system. Any ideas?