Windows 7
Firefox 4.0b8pre crash in [@ nsXBLService::GetBinding(nsIContent*, nsIURI*, int, nsIPrincipal*, int*, nsXBLBinding**, nsTArray<nsIURI*, nsTArrayDefaultAllocator>&) ]  [@ nsCOMPtr_base::assign_from_qi(nsQueryInterface, nsID const&) | xul.dll@0xbf3fb3 ]
XBL