IE/WIN The IE Doubled Float-Margin Bug on admin pages

Similar to the "content getting pushed down" issue. As in good css tradition, IE bugs never come alone, and it can be difficult to separate them. I'll describe here one symptom and open up another bug report for another to keep things clear.

Working in: IE6 / WinXP

On the admin pages, depending on the size of my viewport (browser window), either the right sidebar drops under all the content, or the .right admin panel drops. The right panel should never drop under, unless the viewport is ridiculously narrow.

I researched IE CSS bugs, and found this demo at www.positioniseverything.net. A bug is described where a margin in a float, in the same direction of the float, is doubled by IE.

Comparing the layout in IE and Firefox, as shown in the attached screenshot, seems to confirm that this is what is happening. The solution is to apply display:inline to the float.

I applied the following fix in style.css of the Zen Theme:

/**
* Fix for the IE Doubled Float-Margin Bug as described on
* http://www.positioniseverything.net/explorer/doubled-margin.html
*/
div.admin .left, div.admin .right {
  display: inline;
}

and it solved the problem. However I am aware that this is an override of the css rules of admin.css, of the core system module. Perhaps this issue is then better reported over there?

For the record, I am working with the Zen developement snapshot that was released on 19 january, and I applied the patch that fixes textarea.js.