It's alright, still very cluttered though.
You would benefit greatly from some more whitespace.
For example, just change the sidebar margin to 20px and main width to 750px, instantly a little less cluttered.
Also, instead of using line breaks everywhere, wrap your sections of content in another div tag with the class, for example, "module" - such as the <h2>Statistics</h2> down to the end of those paragraph tags. Then you can add margin:0 0 20px 0; to your "module" class and remove all the line breaks. Again, less cluttered.
Also, I think your dropdowns would look nicer if they were styled similarly to the main bar - a little more left padding, white text and a more noticeable highlight on hover.