after OVI implemented the latest upgrade only users who bought the item could review it which is good.
but now we cant as the publishers write back to the user in order to assist him with any problems he may have
we have to buy the content item in order to write back which is not good.
you should allow publishers to write back to users who wrote comments/reviews in which they stated they have some difficulties.
either from the publishers site or from the ovi store site.