IE font size issues...please help

I just installed the newest version of zen cart about 2 weeks ago. I have had zero problems with anything until.....i looked at my website one day in IE. I had based all of my formatting on Firefox and didn't think it would be so different in IE. The default font size of 67.5% works wonderful in FF but looks HUGE in IE. I have edited the stylesheet with every px, %, ex, etc that I could find. I even tried to set up a separate stylesheet just for IE. Of course I don't know the first thing about CSS so i probably did it totally wrong. Can someone please look over the site and see what I mean. I reset the font size to the default so everything is in stock form. I am open to anything at this point.....anything. I need this site up and running asap for my fathers business. Thanks so much for any help in the matter. Oh yeah I did install the lightbox addon, but I dont think that had anything to do with it.

the site is located at -
https://www.moorecountrycrafts.com

Appears you have set your tagline incorrectly;

notice the h1 tag needs a closing tag... This will be set in your languages file - header.php

You tagline has an error - probably in your languages - header.php file...

You have not closed the H1 tag properly;

Firefox fixes the tag, IE doesnt and thus makes the rest of the page H1....

Hey I see noe that the site wasent totally validated. The problem now is that I swear I have looked thru every header file I can find within my site. And nothing looks like the faulty tagline you have outlined. I even went to the w3c website and tried tovalidate it to narrow down the problem. The results dont say what file this came from. I checkec the languages header and it doesnt have this tag. I am starting to get very frustrated with such a small error, Im just too much of a newbie with this to fix it. Thanks also for the input so far. I will keep trying, if you have any additional suggestions Iwould appreciate it. Thanks

In a default ZC install the tagline is called in includes/templates/template_default/common/tpl_header.php around line 77

<div id="tagline"><?php echo HEADER_SALES_TEXT;?></div>The tagline itself is defined in includes\languages\english\header.php around line 22

define('HEADER_SALES_TEXT', 'TagLine Here');Chances are you will find what you're looking to fix in one of those files...good luck :)

**edited to add...after a lil more digging...I think you might find the h1 tags defined here: **includes/languages/english/classic/header.php

> define('HEADER_SALES_TEXT', '<h1>Sales Message Goes Here</h1>');
**