TinyUmbrella has been updated to v5.00.05 with support for iOS 4.3.4. Apple came out with their ‘fix’ for the pdf vulnerability that JailbreakMe 3.0 uses to jailbreak devices. But @comex has released a much better fix for the vulnerability which also incidentally allows you to stay jailbroken. TinyUmbrella can save 4.3.4 SHSHs (as well as the other ones Apple is still signing). So grab the latest if you want to save 4.3.4 for nothing else than for the sake of completeness.

Download TinyUmbrella for Mac and Windows here.