Hello,
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 [1], it is broken since r22580 [2] 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.
[1] http://www.mediawiki.org/wiki/Special:Code/MediaWiki/72865 [2] http://www.mediawiki.org/wiki/Special:Code/MediaWiki/22580