adjust behaviour off right column in three column layout

Answer 1

They're all percentage widths, so set the col1 div to a fixed width and this should give you what you want.

/* width center column content */
.threecol .col1 
{
  width:400px; 
  margin-right:50px; /*or percentage eqivalent*/
left:101.5%;
/*background:#fff004;*/
}

Tried in firebug, works fine :)