So I got my gs3 today. Rooted it, and everything went well, but then I decided to download cm10. It was the stable version, and it just won't stop bootlooping. It's taking forever to boot, and I really need help. Thanks.
My boot loader was actually unlocked. The problem was fixed already when I flashed back to stock with odin. Still don't know why cm10 won't flash though...Did you use EZ Locker or some other method to unlock the bootlocker?
Same thing happened to me because I forgot to unlock the bootlocker.
Let me know.