errors in background

In your wp-layout.css you have:

hr {
display: none;
}

changing it to:

hr {
display: none;
clear: both;
}

should solve the problem.

.narrowcolumn:after {
content: ".";
display: block;
height: 0;
overflow:hidden;
clear: both;
visibility:hidden;
}
* html .narrowcolumn { height: 1%; }

But you really should fix your markup. Lots of XHTML mistakes. That may cause trouble too.

Sorry, I made a mistake (’twas late…). You need this:

`#page:after {
content: “.”;
display: block;
height: 0;
overflow:hidden;
clear: both;
visibility:hidden;
}
* html #page { height: 1%; }