Google font change is a great example of a well thought logo change. Going through a logo makeover is a risky decision for any brand. I wouldn’t recommend changing the logo without finding a way to transition your customers into your new appearance.

A great example is the iTunes logo, the previous logo showed a simple CD with a shining musical note ahead of it. The logo was easily recognizable and related to the product. In fact, I find the old logo was quite iconic for Apple. I am not overly fond of the current iTunes logo (blue bubble with a note inside), it looks flat and dull.

MasterCard and Animal Planet logo changes are also two striking examples of newer is not always better, the logo changes left customers confused. If your logo change is barely noticeable that customers can still see your brand in the new look, then you might not have any trouble transitioning to them.

Click the link below to see the list of the worst logo makeovers.
http://www.thedailybeast.com/galleries/2010/10/12/13-worst-logo-makeovers.html#slide2

What do you think of the new iTunes logo?
Results of a poll a couple of years ago, 69.49% preferred the previous logo.
http://www.huffingtonpost.com/2010/09/01/new-itunes-logo_n_702475.html