Hi,
I was able to replicate this on the demo site. My browser mode is IE 10 Compat View, document mode is IE7 Standards.
The OuterWrap panel has inline style of "width: 0px;" which is probably coming from an Artisteer script.
http://i.imgur.com/XxhVGnr.png
I think the issue is with script starting on line 401 in script.js.
You should be able to fix this by adding the following to style.ie7.css.
.searchresults .art-content {
width: auto !important;
}
HTH,
Joe D.