We still have a the 1.4 -> 1.5 upgrader in trunk. It was used to handle
both the schema changes and the encoding changes that occurred in 1.5.
According to code review on r72865 , it is broken since r22580 
from May 2007.
Can we please remove it for 1.17 ? I am not sure we still have to
support an upgrade from 1.4 which is like 5 years old and probably not
used anywhere nowadays.