Well, its not exactly unstable in that the jailbreak does work, but when i download some apps through cydia and put them on it all seems to work fine, untill i restart and then it gets caught in a booting loop trying to get into the normal ipod unjailbroken software. I spent hours this morning reapplying the jailbreak at least 4 times, but i kept on experiencing the same problem. Ive just decided for now to go back to tethered, but if anyone has any ideas on how to prevent this from happening i would like to know. Or this a common thing happening? Some of the apps i tried were winterboard, miPatch and what would be background apps.