You should change the post background because it make the post difficult to read. Others is fine for me.
That is a very nice site indeed. I must say i like the mini aquarium thing you have going on, i was going to say you used too many dark colours until that came up Nice one!
Very cool site, I like the template specially the search bar But three main things: first as they said change the text color so that it will be alot easier to read two give a bigger line-height to your post titles so they fall right in the middle three change the size of your RSS icon it looks stretched and not right