The header area could use work: a new logo design with a thicker more clear font, a nicer icon design and maybe change the register button to a more saturated green color.
The forum stretches out of the template itself, and looks messy having to scroll way over. I think it's because of the huge picture you used.
I would repeat what you have in your TITLE tag in the body copy...below you libtips logo or something...for SEO purposes.