Yeah I have the same issue... I think I also know why this has become an issue for me. First time I entered the Redcliffe there was a very long loading sequence, like 2 minutes (dunno what was up with that) but after I had loaded the area the game seemed to not register the fact that I had entered Redcliffe.. I didn't notice this then but later I have always had a "-Enter Redcliffe" as a part of the quest chain and thus it refuses to complete, since it counts as something I still need to do before quest is finished...
This is kinda annoying since In hushed whispers is part of a MAIN quest chains and only way to get next main quest in the chain is to complete this quest... so I'm screwed, am I?
Any1 know if there are some kinda console commands to clear/complete quests?... I'd really like that :/
E: btw, I was wrong about the "quest chain" complaint, I mean I do seem to have the next quest in line "In your heart shall burn"... but the old quest persistently remains in the quest journal.