Fortunately for jailbreakers who like to stay on top of things, hackers out there are already claiming to have sidestepped Apple's new security measures and to have a working Pwnage Tool.
The information is not 100 per cent confirmed, so we would not update just yet, especially as there is no other tangible benefit to the 4.3.4 update. Well, except for the peace of mind that comes with patching a gaping security hole, even if nobody is using the exploit for devious reasons at the moment.
