BasicDialog incompatible with ylayout-inactive-content?

[SteveEisner]

Noticed that when I have class="ylayout-inactive-content" on the div that will become a dialog, and that dialog is modal, then dragging it causes it to disappear. The shadow stays behind.

<div id="edit-dlg" >  
    <div class="ydlg-hd">Title</div>
    <div class="ydlg-bd">
      ...
    </div>
    <div class="ydlg-ft">
    </div>
</div>


	  showDialog: function() {
            if(!dialog){ // lazy initialize the dialog and only create it once
                dialog = new YAHOO.ext.BasicDialog("edit-dlg", { 
                        modal:true,
                        width:600,
                        height:150,
                        shadow:true,
                        minWidth:500,
                        minHeight:150
                });
                dialog.addKeyListener(27, dialog.hide, dialog);
                dialog.addButton('Save', dialog.hide, dialog);
                dialog.addButton('Cancel', dialog.hide, dialog);
            }
            dialog.show(getEl('addContactButton').dom);
        }

Is there a better way to start the dialog initially hidden?