I also got this bootloader screen with htc update that comes with Tango. However I decided to flash stock rom to reintall hspl and custom rom. Before flashing stock rom I was playing with the value of the modem bridge and htc log and disabled it. On reboot with newly reinstalled stock rom, my computer is unable to identify my phone and install usb driver hence I cannot connect my phone to Zune nor use the cab sender. On spl mode, computer correctly install usb sync driver and i can flash using RUU or goldcard. ATM I'm on custom rom and managed to install / sideload xaps directly from internet explorer, but I really would like to be able to sync my phone with Zune. Any help / suggestion will be greatly appreciated. Thanks in advance.