Just days after the release of iOS 4.3.4/4.2.9, Apple has released another minor update 4.3.5/4.2.10. This update is a patch to fix a security vulnerability with certificate validation. i0n1c's untether exploit was patched in 4.3.4/4.2.9 so like those firmwares, the only option to jailbreak 4.3.5 or jailbreak 4.2.10 is to use Redsn0w for an tethered jailbreak.