[Theme: Brightpage] Header Image – hyperlink

Hi there,

I’m having troubles with the header image on my Brightpage blog.

You’ll see it right away when you visit my blog: http://seesimi.com/

How can I rid the image of that oval shape right in center? Also, is it possible to to add a hyperlink to the header image itself in the WordPress?

Thanks for your help!

http://ww.wp.xz.cn/extend/themes/brightpage/