1.3b2 selector engine *much* slower than 1.3b1 under FF 3.0.5

1.3b2 selector engine *much* slower than 1.3b1 under FF 3.0.5


I noticed this while working on an in-house project. Note that the bug
does not appear to affect FF 3.1, which probably means qSA handles
whatever it is that changed well. I've hastily thrown up some quickie
test cases.
Version: jQuery v1.3b2
Ticket: http://dev.jquery.com/ticket/3819
Running FF 3.0.5:
Using 1.3b1: http://doctyper.com/stuff/jquery/1.3b1.html
Using 1.3b2: http://doctyper.com/stuff/jquery/1.3b2.html