I've not had this bug before, but trying to submit a review for Thomas Was Alone I've found the site just not taking my review score. I put in my rating, but it just comes up as 0 stars after I click submit, or on one occasion half a star, and I can't attempt to edit it afterwards because there's no option to do so when you load it back into the editor. I doubt the issue is to do with the client I'm using, but for the record I'm getting this in both Firefox and Chrome.
Edit: Okay, so if I can sneak this in here I've just discovered a related bug. By creating reviews and then deleting them, you can drop your review count below what it logically should be. I've done at least 42 reviews on the site, but from deleting the bad reviews over this bug, my profile now reports that I've written 39 reviews.