Google Maps has become an extremely popular local search destination. Thus, making sure your Google Maps reviews are in order is an important part of your overall SEO and SEM routine.
A recent report at Google Maps Help forums has a confirmed bug where Google is pulling the wrong star values from third party review sites. In one case, Google is counting 4 out of 5 stars as 1 out of 5 stars - yes, that can be devastating.
Here is an example:
Look at this Google Places page review:
Google Maps shows one star, but when you click through and look at that specific review, it shows up as four stars:
Google's Joel Headley confirmed the bug and said "We're working on a fix and hope to get it resolved soon. It will likely be a multiple weeks before it's resolved."
Oh, if you are bored, feel free to drop my company a positive review. :)
Forum discussion at Google Maps Help.