Im downloading a new image right now because power went off after I posted this (1-2 hs wait, 70-90Kb/s dl speed).
Checksums are different, but I think the images are different, though I haven't found a 637Mb xfce amd64 iso so it might be corrupted.
Anyway, tried to manually extract the iso and extracts fine. Checked the usb drive and passes fine.
EDIT: Ha! Got to see the syslog, md5 error Just finished downloading the new image. I'll try with that one.