It looks like there’s a background defined for ”.wrapper .left” which defines the “left side” of the post (the right side is the tab with the date). It uses a background image called left-repeat.png…

It is line 100 in the page you linked, but with your changes it might be different for yours.

Here are the styles -

.wrapper .left {
background:transparent url(left-repeat.png) repeat-y scroll left top;
float:left;
width:536px;
}

I hope it helps.

Hey thanks for the help! It worked!