Having almost the same issue. I'm in Bodhi's labyrinth in Spellhold and I've reached the northern part of the room (after the southern/western riddle room). I've killed the Rakshasa and the mephits, now Yvette is trying to initiate a conversation but keeps failing. But she's running over to me constantly and instead of actually talking to me, she's instead just saying things as if I'm clicking on her.
What gives? :S