Hand-coded XHTML+CSS won't display properly in Layout View (WYSIWYG)

Pages validate, fluid CSS floated columns used in design.

[audiolizard]

I work as a full-time web designer using Adobe GoLive CS2 for my development platform. I recently designed a 2-column site with a header and footer using a CSS layout with floated columns. Unfortunately, when I build this type of site, it doesn't display properly in the Layout view of GoLive, even though it validates and displays correctly in the Preview mode and in web browsers. Now my client's IT department is attempting to test the site on their in-house server. They are using Dreamweaver and are complaining that the site won't display correctly in the layout view WYSIWYG editor. This isn't unexpected because I can't view it correctly in the Layout view of GoLive either.

Is this just an unfortunate consequence of hand-coding fluid layouts with floated colums using CSS+XHTML? Or is there something that I could do differently to get the Layout view to display the page better in Dreamweaver and GoLive? Has anybody else experienced this problem?

[jessejump]

DW doesn't display some CSS layouts very well. That's the way it is.
Just hit F12.

[audiolizard]

Apparently, neither does GoLive. Is this common among all WYSIWYG editors? Does it just happen with fluid CSS or floated layouts? If the client insists on being able to use the Layout editor in Dreamweaver, what's the fix? Will replacing the major layout divs with a table layout make the rest display properly in the Layout View?

What I'm getting at is what specifically can't the Layout view renderer handle, and what's the fastest, least-effort solution? (besides F12)