so, I'm trying to jailbreak my iphone with 4.3.3 using JB 3.0, but I keep getting this error: There was a problem downloading the jailbreak files. Invalid Checksum. Any idea what is causing this / how to fix it?? I've cleared my cache, cookies, and history, but it still won't work. Help! I just upgraded from 4.1 to 4.3.3 for this JB and now it won't work!