It's actually a fairly common thing to get a bug list with review code. Sometimes the list is short, and other times the list is LOOOONG. When I was reviewing games I'd sometimes call up a publisher and ask if something I was about to rag on in a review was going to be fixed before it hit stores. If they assure you that things will be fixed, what do you do? Mention it in the review as a fault when the version people buy in the store won't be affected by it? It can be an incredibly difficult issue to balance. Especially if the list of bugs is very long and includes things you'd normally point out and rag on.
In this day and age where magazines often fight over "exclusive reviews," this kind of thing can and will happen. It does not necessarily mean that any scores have been bought-off or fixed. That's really only something that pissed-off readers like to throw around.
