Hi, since the upgrade from 5.4 to 5.5 can be quite dangerous when done manually with only remote access, I patched yaifo to upgrade my personal server. It is functional only for amd64, I did not test any other platform. For those who are interested, you can find the patched version here: http://joachim.cc/files/yaifo55.tar.gz
Best regards, Jona JOACHIM