[css-d] Cannot get columns equal in height

I have a three column layout that cannot get the three columns equal in height. Before I rounded the corners I had padding-bottom: 32000px; margin-bottom: -32000px; in the class of each column and they were equal in height. But when I rounded the corners of each column, I had to remove the

[css-d] 3-col layout problems

This is my 1st post to CSS-Discuss. I am fairly familiar with CSS. I'm not a novice, but I'm no expert. I've been trying to work out a 3-col layout without copying someone else's. I want to work through this myself. I've got the layout working in Firefox Netscape. But the columns won't