When Apple announced the release of the iPhone for the UK, it also announced that iPhone and iPod touch firmware version 1.1.2 would be released at the same time. Released today, firmware 1.1.2 closes the TIFF vulnerability in mobile Safari that was used to jailbreak firmware 1.1.1.
Confirmed by DailyTech, the TIFF vulnerability no longer works. However, despite Apple's effort to lockdown the iPhone and iPod touch, firmware 1.1.2 has already been jailbroken.
Credit go to the people behind AppSnap, the same utility used to jailbreak 1.1.1 devices. According to TUAW, testing of the new jailbreak began several nights ago, when the new 1.1.2 firmware was made available for download not through iTunes, but through Apple's website.
In its current stage, the new jailbreak requires several steps in order to complete, and is by no means release ready and user friendly. AppSnap and jailbreakme.com still remains open for 1.1.1 only, but the new jailbreak is being prepared for the same single tap installation.