Enlarge image position problem at IE9

I have two separate Opencart stores.
One is v1.4.9.1. The link is http://www.sfplustransceiver.com
The other is v1.4.9.3. The link is http://www.prosfp.com

Both the two stores have a problem with enlarge image of the products.
The bottom part of the enlarge image goes outside of the monitor at IE9.
And there is no way to bing it to monitor.

But it is no problem at IE6, IE7, IE8 and Firefox 3.6.
How can I fix it at IE9?

I found the demo site of www.opencart.com has the same problem.
Does anyone know how to fix it?

You're right, and it's already noted, though I don't think it's high on the priority list for a fix. There are not many IE9 users yet, and Opencart is due for a major new release at some point.

There are a couple of ideas for a fix in my thread (not yet tested by me)