I have recently set up the reviews and it worked fine until about a week ago and I have not made any template changes.
The only difference is that the database is being populated by more and more products.
Reviews is integrated with
VB and I use the
VB templates.
I have installed some new products in
VB if that could be a problem, vbgooglemaphse and Links and Downloads Manager.
Have a look
http://www.surfzone.se/ppr