Issues with latest jQueryUI (accordian contained inside a tab list)

Issues with latest jQueryUI (accordian contained inside a tab list)


I downloaded the latest jquery UI code yesterday and developed some
concepts for a project and it worked fine in firefox 3 but in IE 7 it
blew up
I have a page with multiple tabs (6) and have the accordian inside
each tab. IT works in firefox 3 but not in IE 7
when you click onto tab #2 then onto the second accordian button you
get
---------------------------
Error
---------------------------
A Runtime Error has occurred.
Do you wish to Debug?
Line: 5409
Error: Invalid argument.
---------------------------
Yes No
---------------------------
which is this block of code (last line is error line)
var percentDone = settings.start != settings.end
    ? (settings.now - settings.start) / (settings.end - settings.start)
    : 0,
current = percentDone * showProps[settings.prop];
if ($.browser.msie || $.browser.opera) {
    current = Math.ceil(current);
}
options.toShow[0].style[settings.prop] = current + 'px';
it seems that on the line
current = percentDone * showProps[settings.prop];
the two values of the muliply have the following values as found with
using visual Studio
percentDone = 0
showProps[settings.prop] = NAN