I seem to be well on my way to bricking my phone. Not sure what is going wrong, following instructions to a T. The SBF starts flashing, gets a little ways (step 4 or 6 or 8, not consistent), and then I get a message about "size data returned by phone does not match what was expected" and it fails. It got far enough that my phone won't boot any more.
I've used RSD Lite before when I had my Droid 1, but I uninstalled the version I had and installed 5.5 from the link in the first post. MD5 checked out on the SBF file so it wasn't corrupted. Any ideas?