tedster - 12:21 am on Oct 29, 2010 (gmt 0)
They did fix a critical 0-day exploit in the just released version 3.6.12 - not sure if it is THE 0-day exploit or not, but I think so.
Fixed in Firefox 3.6.12
MFSA 2010-73 Heap buffer overflow mixing document.write and DOM insertion
https://bugzilla.mozilla.org/show_bug.cgi?id=607222 has the Bug Report from 2010-10-25