Okay, you asked for it.
1. The green title text needs more line-height. When long titles wrap to two lines, it looks crowded.
2. If you are going to be a theme designer, you should stand behind your design. I think it’s kind of crass to offer a design and then go, “see ya.” Our web design shop has released over two dozen WP themes in the last year or so, and over a dozen themes for other blog apps. We stand behind our designs and troubleshoot (at no charge) *unaltered* versions of our themes. It’s the right thing to do. But of course, you can do what you like. Just bear in mind that you did ask. ??
3. The post about the Gwen Cover drops off the white content background in Opera 9. Do you check your themes in all the major browsers?
4. Validate, validate, validate. Your CSS (stylesheet) contained 8 errors; your HTML contained many more than that. Most of your HTML errors can be eradicated if you understand one basic concept about CSS:
IDs .. only used once per page. They are good for layout sections. They are NOT good for repeating blocks of text such as posts. For that, use a class instead (.element, rather than #element).
https://www.w3.org/