Few questions about the Social Theme

Hello.

I've just installed the social theme.
I have a few questions:

My forum looks "different". There is something wrong with it, I tried to fix it myself but with no success.
Here is the picture for your reference.
http://imageshack.us/photo/my-images/202/85693530.jpg/

I'd like to change the color of my buttons to have only one color instead of gradient.

How can I customize the header menu links for logged in users? the one with "Welcome back.."? I'd like to add, edit and delete some links.

Is it possible to change the position of search widget? I'd like to place it next to the main menu.