A subsequent search revealed this link: http://www.speerio.net/default.aspx?tabid=810&view=topic&forumid=11&postid=2039
Suffice it to say, here are the changes that need to be made:
These files can be found in /controls/Speerio/Skinergy
Change line 36 in the skinprefs.ascx control to:
Sub InjectStyleSheet(ByVal cookieId As String, ByVal suffix As String, small As System.Web.UI.WebControls.Image, medium As System.Web.UI.WebControls.Image, large As System.Web.UI.WebControls.Image)
Replace the first line in adminpanel.ascx with:
<%@ Control language="vb" AutoEventWireup="false" Explicit="True" Inherits="DotNetNuke.UI.ControlPanels.IconBar" CodeFile="~/admin/ControlPanel/iconbar.ascx.vb" %>
Once these changes are made, the Speerio Skinergy Accessibility objects will work.