Make alternative logo to fit page

Hi, my site is http://www.NowEntertain.Us

In Chrome and in Safari what I’m looking for works automatically. In IE and FF, the default and alternative logo extends past the rest of the page and makes the page so it no longer fits the screen, but requires scrolling to the right.

There may be a better way to do what I’m trying to accomplish, so I’m up for either doing it a different way, or modifying the CSS. I want the logo space to change depending on the section. I made the default logo the image that I use most, and then choose an alternative logo for different sections (About Me and Portfolio). Ideally, I’d like the logo to inherit the 100% width that the rest of the page uses, but it doesn’t.

Thanks in advance for your help.