With the release of new Gingerbread for the Galaxy 551 comes a new niggle . A new Bootloader has certain risks Risk no. 1 : Froyo and Gingerbread ROMs are not cross compatible on the bootloaders .Which means you cant run Froyo ROM on GB Bootloader or Vice versa . Attempting to do so may brick the phone Risk no. 2 : If Odin fails during a bootloader flash ,well the device is as good as gone . Froyo ROMs have Bootloader in the Bootloader tar.md5 while GB has everything in one package .