tkearsley

tkearsley - Below is the call to fetch all the post which doesn't have any reply yet. 

SELECT * FROM messages WHERE replies.count(*)=0 AND depth=0

Documentation https://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv2&collection=messages#constraints-replies.count(*)

To fetch all the post which doesn't have any solution.

SELECT * FROM messages WHERE is_solution = true and depth = 0

Documentation: https://community.lithium.com/t5/Developer-Documentation/bd-p/dev-doc-portal?section=commv2&collection=messages#constraints-is_solution

tkearsley 

When you want to change style to any website, a good start is to use FireBug (with FireFox) or any Web developer tool (Chrome / IE / Safari). And inspect the element(s). It will show you the CSS style. And you can even modify it on the fly.

You will notice that the rounded corners are images.

There is an article explaining how it works. Please check it out I think it answers your question perfectly.