OKAY WHAT
It breaks your ability to use QuickPwn, PwnageTool, and iPhone Tunneling Suite (ssh over usb). We don’t think this is a deliberate breakage of these tools. It’s just that Apple has updated a low-level USB protocol that normally only Apple cares about (but jailbreakers care about).
WAIT WHAT THE HELL!? Did USBMux/MuxTCP (the over-the-wire USB protocol used to communicate with the iPhone) get modified or something!? Am I going to have to rewrite that part of libiphone!?!?!? AAAAAARGH
