as you may have noticed, the spoiler bbcode works differently now. play with it to see.
further, past spoiler tags may no longer work - search has shown mixed results. this means that any spoilers in posts made prior to now may be exposed by default. will need to edit the posts - and possibly add a title to the spoiler to kick-start it - to re-parse the spoiler tags. so please just be aware, you won't see any warnings on spoiling older content.