A DoS condition has been reported in mozilla versions 1.6 and below. I'm not sure what's going on to cause this, now do I know if this issue is exploitable. See this link for more information. http://marc.theaimsgroup.com/?l=bugtraq&m=110512665029209&w=2
This issue doesn't affect us after all. The BMP fix was general enought to protect against this.