hello here, I got exactly the same probleme on my website using v7.8
I tries lots of thing, like using a old version of the review module, re-editing the page... , but no results... like him on the preview/edit page it's normal but on the normal page we see lots of codes :/
(i don't have this problem on the others modules, only on the reviews module)

can someone knows what to do the earse this bug please ?