Pineapple logo: The phone was jailbroken some time ago. I guess at "that time" the jailbroken phones using pwnage tool had the apple "loading" logo replaced by a pineapple one...
i don't know if this is allowed, but... here is an image:
http://www.iphonehacks.com/images/08...wned-image.jpg
in my case, the "cicle loading" image that's on bottom appears "behind" the pineapple...
I've already tried an usb hub, since i read somewhere that mac os x had trouble recognizing DFU mode in version 10.5.6 (even if mine is 10.5.7 and i tested it on windows)
I guess there's not much hope, right? :/