nested :not inside :has doesn't work in Firefox 3 and Safari 4 (jQuery 1.3.2) ...worked in jQuery 1.2.6

nested :not inside :has doesn't work in Firefox 3 and Safari 4 (jQuery 1.3.2) ...worked in jQuery 1.2.6


Hi all,
I have this selector: $("div:has(.help:not(.fixed))") looking for the
first <div> only:
<div>
...
<p class="help">Help
...
</div>
<div>
...
<p class="help fixed">Help Fixed
...
</div>
It worked just fine in every supported browser until I switched to
jQuery 1.3.2. Now it works in almost every browser but Firefox 3 and
Safari 4. Should I raise a ticket?
Test case here: http://jsbin.com/ofeme
Thanks.
--
Bohdan