I've noticed when validating for a site with this theme that the alt tags are missing in many areas. They are a simple and important part of describing images for those with disabilities and it'd be great to get these added in if for nothing more than valid markup (W3C validator).
I've also noticed a couple of issues in the CSS that should either be commented on if intentional or corrected if accidental.
Example: *vertical-align: I realize this may be a specific browser fix, but the comments for both vertical-align rules are identical so its not clear what the benefit of the invalid *vertical-align is for.. IE? FF? An error?
font-size: 100%; /* Corrects font size not being inherited in all browsers */
margin: 0; /* Addresses margins set differently in IE6/7, F3/4, S5, Chrome */
vertical-align: baseline; /* Improves appearance and consistency in all browsers */
*vertical-align: middle; /* Improves appearance and consistency in all browsers */