Please note, updating will destroy the ability to try homebrew!

Here are news from Apple about the recent update:

This document describes the security content of the iPhone v1.1.2 and iPod Touch v1.1.2 Updates, which can be downloaded and installed via iTunes.

For the protection of our customers, Apple does not disclose, discuss, or confirm security issues until a full investigation has occurred and any necessary patches or releases are available. To learn more about Apple Product Security, see the Apple Product Security website…