Something weird is happening with your CSS. When I view your home page, the text appears to be a default of a large serif. Then when I click some links, the pages appear to be in a default of a normal-sized sans serif. There is either some serious lag time for the custom CSS to be properly rendered or some sort of CSS issue causing oddness.

If you have been working on CSS, another tool I use in developing sites is Web Developer, a very helpful Firefox Add-on. I'm not entirely up to speed with it but I it works great to troubleshoot CSS. Setting views of Information > Display Element Information and Information > Display Topographic Info have been invaluable for me.

BTW, note that I am not trying to offend you or your skill level. I am (and may be) posting a lot of extraneous info here and there because I'm putting together a tutorial over the next week or two to hand off a Zen Cart site I developed for a client and will be coming back to the forum to grab my riffs. Thus, I'm somewhat trying to get in the mode of replying for lowest common denominator and thus am trying to assume a low skill level regardless of actual. Not the easiest thing to train HTML newbies let alone computer newbies. And I'm no skilled coder by any means. I've got a long way to go.