rt-block
class has 15px padding by default. The right block (with 'ultimi') has padding 0 because it's wrapped by a different block.
See the code below:
<div id="rt-content-bottom">
<div class="rt-grid-5 rt-alpha">
<div class="rt-block">
...
<div class="rt-grid-4 rt-omega">
<div class="rt-block">
and css:
rt-main .rt-container .rt-grid-6 .rt-block, #rt-main .rt-container .rt-grid-4 .rt-block {
padding: 0;
}
.rt-block { margin-bottom: 10px; padding: 15px; position: relative; }
Just set the same padding value to both .rt-grid-5 .rt-block and rt-grid-4 .rt-block