When given a quest :

• Clicking on objectives doesn't show the Accept/Decline buttons (while clicking on the text does).
• Clicking on objectives while they are opened just closes the window (instead of accepting the quest, while clicking on the text does).

From what I gathered, the objectives frame always calls the QUEST_PROGRESS event on click, while it probably should call the QUEST_DETAIL event when the quest is first given. Unfortunately, since I'm not too familiar with Storyline and quest functions, I couldn't find how to fix this.