When I do the required task to complete an optional objective, it does not complete and instead removes it from my quest log entirely. I have tried starting a new game, reinstalling, reloading an old save, getting a new copy of the game twice, playing on a different ps3, deleting all my old saves, and nothing works. My ps3 is the slim 320gig and my friend's which also had the same problem is also a slim model, tho i do not know the memory size of it. I also have the update, as well as my friend on his ps3. My first copy did not have this problem, but later in the game it was messing up really badly (not the usual ps3 issues associated with long time play), and I lost all my saves and eventually could not make it past the title screen, so i got a new copy. The last 2 copies i have tried playing on have this issue. On both ps3's, i remind you, so it couldnt possibly be the systems issue, right? i don't know anyone else who has had this problem, except me, and now my friend as well when i used his ps3. I searched online, but did not find anything, even to pages devoted to Skyrim's bugs/glitches. Any feedback would be greatly appreciated!!