It would be very helpful if you remove some "clutter" here. 
* No need for a title-attribute that duplicates the visual text
* alt-attribute on the image should be an empty string

This is what Voiceover is announcing when the link has focus.

![screen shot 2013-11-27 at 10 39 23 pm](https://f.cloud.github.com/assets/74497/1635373/0bdc41ec-57ad-11e3-8515-7e031193e419.png)