Lately my Tosh has being having fits reading DVD-Rs authored by it. It has begun taking an age to load when successful, and more often than not throws up one of the following two messages: (i) Disc may be dirty or damaged (I'm paraphrasing). On checking some discs, thumbprints evident - on others, no sign even of dust! (ii) Something is wrong with disc. Playback available only (again, a paraphrase). Disc content will play, but menus are not available. When I look at Disc Management on Quickmenu, it says that the disc is not finalised (when it has been, and through the DVD-Video Create function in the Edit menu). All discs that have displayed this problem play perfectly well in my dedicated DVD player and laptop DVD. Anyone experienced similar problems or have any ideas? This situation has only arisen within the last few days.