wp_list_categories builds array in Chrome but not FF/IE?

Hello,
I am starting to get into the API, but I’ve already found tricky bits!

Here’s the oddness:

Using a php include within index.php, I am calling the wp_list_categories(); function.

In Chrome I get the list as it should be, no problems. But IE and FF both fail to populate the array.

See here: http://www.blogscanada.ca/categories/

I’ve tried various calls to the array, including making it into a bullet list as such:

<ul class="catsList">
	<?php foreach($cat as $var){ ?>
        <li>
		<?php echo $var->name?>
        </li>
	<?php } ?>
</ul>

Any idea why a browser would render the arrays differently?

Thank you!