Rendering issues in an element (no visible) 3 columns

This problem bothered me once now, I did not stop at the solution and tried several approaches. I try to keep markup semantics as possible. I was looking for similar questions, but I had problems abstracting my problem in order to find a suitable solution.

I think very quickly to explain my approach to design. For starters, I'm not a designer. I do not have formal training, but I managed to find myself a programmer. I have been working on the Internet since I was 11 years old (1997) and have greatly influenced the movement of web standards in high school (2000-2004). And until a few months ago, I thought about web work since then. The company I'm working on paid the designer for the design work in Photoshop and was about to pay the other person for the CSS. It didn’t bother me, and I decided to go over and take a picture at work, and so far so good.

However, I missed the sag. we have a search form that was designed as a three-column field. Due to the nature of my work, I had to distract the box a bit. the field is displayed correctly in webkit, but the central column will not fit correctly in firefox, opera, and especially IE (not shown). This looks worse in older versions of these browsers. This might be the right time to check out a live example: http://jsfiddle.net/KdFT7/

. " X", X-, div XChoice, (<p> ) X . , , , AddY. , - , .

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HTML

<div class="rightCol">

    <div class="addX">
        <h2><span class="tiny">Add</span>X</h2>
        <span class="ui-corner-tl ui-widget-header ui-widget-borderfix"></span>
        <div class="innerContent ui-padding-med ui-widget-content">
            <form>
                <input type="radio" id="radio-0" name="radio" checked="checked" /><label for="radio-0" class="ui-spacer-med">And</label>
                <input type="radio" id="radio-1" name="radio" /><label for="radio-1" class="ui-spacer-med">Or</label><br />
            </form>
            <p class="descrip ui-spacer-med"> Click the button to lookup and select X for your search </p>
            <div class="XChoice"></div>
            <p class="xSelected"></p>
            <!-- brings up modal form -->
            <a href="addX.htm" class="addXButton">Add X</a>        </div>
        <span class="ui-corner-bl ui-widget-header ui-widget-borderfix"></span>
    </div>

    <div class="centerCol">
        <span class="ui-widget-header ui-widget-borderfix"></span>            
        <form class="clause ui-widget-content ui-padding-med">
            <input type="radio" id="radio-2" name="radio" checked="checked" /><label for="radio-2">And</label><br />
            <input type="radio" id="radio-3" name="radio" /><label for="radio-3">Or</label><br />
            <input type="radio" id="radio-4" name="radio" /><label for="radio-4">Not</label><br />
        </form>
        <span class="ui-widget-header ui-widget-borderfix"></span>
    </div>

    <div class="addY">
        <h2><span class="tiny">Add</span>Y</h2>
        <span class="ui-corner-tr ui-widget-header ui-widget-borderfix"></span>
        <div class="innerContent ui-padding-med ui-widget-content">
            <form>
                <input type="radio" id="radio-5" name="radio" checked="checked" /><label for="radio-5" class="ui-spacer-med">And</label>
                <input type="radio" id="radio-6" name="radio" /><label for="radio-6" class="ui-spacer-med">Or</label><br />
                <input type="input" value="Enter Y(s)" /><br />
            </form>
            <a href="#" id="example">example</a>
            <ol>
                <li> We should find an example to put here?</li>
                <li> Examples? </li>
                <li> Yes, perhaps 3 solid examples </li>
            </ol>
        </div>
        <span class="ui-corner-br ui-widget-header ui-widget-borderfix"></span>
    </div>
    <div class="addSubGroup ui-corner-all ui-widget-content">
        <a class="rg ui-icon ui-icon-circle-minus" title="Remove Sub Group">Remove Sub Group</a> <a class="ag ui-icon ui-icon-circle-plus" title="Add Sub Group">Add Sub Group</a>
    </div>
    <span class="sub-clause">
        <form class="ui-corner-all  ui-widget-content">
            <input type="radio" id="radio-7" name="radio" checked="checked" class="ui-spacer-med" /><label for="radio-7">And</label>
            <input type="radio" id="radio-8" name="radio" class="ui-spacer-med" /><label for="radio-8">Or</label>
            <input type="radio" id="radio-9" name="radio" class="ui-spacer-med" /><label for="radio-9">Not</label>
        </form>
    </span>
</div>

CSS

* { margin: 0; padding: 0; zoom: 0; }
body, html {font: .9em/1.1em HelveticaNeue, Helvetica, Arial, sans-serif;}


.addY,
.addX{ float: left; max-width: 370px; min-width: 218px; width: 43%; }
.addSubGroup { float: left; margin: -1em 0 0 80%;   padding: .25em .5em;    width: 2.5em; }
.ag, 
.rg { float: left;}

.centerCol { float: left; margin-top: 3.05em; max-width: 66px; min-width: 46px; }
.clause { border-left: 1px solid #fff; border-right: 1px solid #fff;    height: 210px;  margin: 0 auto; }

#example { margin-left: 1em; }
#example+ol { display: none; line-height: 1.5em; margin-left: 2.5em; }
.rightCol { float: right; height: 350px; margin: -1em 1% 2%; width: 73%; }
.sub-clause { display: none; float: left; margin: 2% 0 1% 5%;   text-align: center; width: 80%; }
.ui-widget-borderfix { display: inherit; height: 1.25em; }
h2 { color: #222; font: 2.2em/1em Georgia, serif; }
.rightCol h2 { margin: .5em 0 -.25em .45em; }
.innerContent { height: 210px; }
.ui-widget-content { background: #eee; color: #000000; }
.ui-widget { font-family: Arial,sans-serif; font-size: .8em; }
.ui-padding-med { padding: .5em; }
.tiny { font-size: .65em }

: http://jsfiddle.net/KdFT7/

PS.

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