Fieldsets Floating in IE7

[gr8dane]

I've got a really weird situation happening in IE7, and I can't figure out what I could possibly be doing wrong. I've got two divs on a page - one floating left, the other right. Each div contains two fieldsets, none of which are floated. This is the general setup:

HTML

<div id="colRight">
  <fieldset id="serviceArea">
    ...
  </fieldset>
  <fieldset id="defineArea">
    ...
  </fieldset>
</div>
<div id="colLeft">
  <fieldset id="profile">
    ...
  </fieldset>
  <fieldset id="profileBio">
    ...
  </fieldset>
</div>

CSS

#colLeft {
  float:left;
  margin-right:15px;
  }
#colRight {
  float:right;
  }
fieldset {
  padding:0 1em 1em 1em;
  margin-bottom:1em;
  }
fieldset#defineArea,
fieldset#serviceArea {
  float:none;
  width:230px;
  padding:0 10px 10px 10px;
  }

Everything lines up perfectly in IE8, FF3.6 and Chrome, but in IE7 (actually, IE8 in Compatibility Mode) #serviceArea floats to the left of #defineArea (or vice-versa) in #colRight, and #colLeft gets pushed down below the now-too-wide #colRight. Since fieldsets are block-level elements, how can they be floating, especially when I explicitly set them to float:none?

There's a stripped-down version of the page at http://www.weddingpastorsusa.org/des..._editform.html. Any help would be greatly appreciated.

[aj_nsc]

Specify a width on the columns (display: inline-block might do it, but I'm thinking IE7 needs a width).

[gr8dane]

Yeah, that works. I was trying to avoid that because I couldn't find any info about how wide a fieldset actually is. After some experimentation, though, it looks like it's width + padding + 4px, at least in the browsers I'm able to test in. So I added a width to both column divs and removed the margin-right on #colLeft. Thanks for the help.

It's still weird that the fieldsets would float, though. I wouldn't have thought that would be normal behavior for a block-level element.