Headers and product text disappears in IE

We're trying to set up a zen cart shop, where we will later move our online shop. At the moment we're just setting it up.

We've encountered a weird problem though.. When viewing the product litsing with IE the header is white/invisible . But if you mark the area using the mouse and clicks around a bit the text is shown correctly. Similar problems occur on the product detail page.
You can view a product listing here:
http://cp3.danhost.dk/~dan15865/index.php?main_page=index&cPath=5_12

When using Firefox everything works perfectly.

If someone could help me solve this i would greatly appreciate it :-)

It seems the solution is adding:
line-height: 1.1;

in the main wrapper.

Actually, your stylesheet_new.css has errors on lines 40, 47, 145, 259, and 796 that might be effecting in the manner you're speaking of.

Most deal with padding, height, or border.