I'm debating whether or not to jailbreak my ipod touch 4th gen. I had a 3rd gen but never jailbroke it. Have any of you who jailbroke yours using greenpoison had any problems with it slowing your ipod down? I've heard that sometimes jailbreaks slow the ipod down and reduce battery life. Have any of you had any of these problems or any problems in general? Also is there any chance that it would brick and be unfixable?