Yesterday, the iPhone Dev-Team finally released their Mac tools for jailbreaking the new iPhone FW 3.1. You can learn how to jailbreak your iPhone EDGE/3G or iTouch here . There are a few apps that are not yet compatible with the new firmware but Saurik didn’t lost any time and already pushed an update for Cydia and MobileSubstrate.
Cydia update solves various bugs, one of the bugs relates to the badges which were not displayed correctly on applications. MobileSubstrate update , addresses issues with applications like Winterboard which becomes perfectly compatible with the new firmware.
Needless to say that this updates are critical and all you need to do is to load Cydia, wait for the auto-refresh and update.