Solr 1.4.0 was released on November 10, 2009
A bug fix release Solr 1.4.1 was released on June 25, 2010
If you found a link to this page in some documentation, it was placed there to alert you to the fact that it described a feature that was first introduced in the Solr 1.4 release.
This implies that older releases did not have this feature.
Post Release Notes
Upgrading from 1.3
The following instructions were inadvertantly omited from the "Upgrading from Solr 1.3" section of CHANGES.txt...
ValueSource API changes
After the final release, it was noted that SOLR-1432 was not mentioned in the CHANGES.txt file. This issue uncovered a bug in the way FunctionQueries were scored, and was exacerbated by changes made in Lucene 2.9 related to pushing scoring down to a SegmentReader level. The fix for this issue resulted in some API additions to the ValueSource class. All ValueSource implementations provided by Solr were fixed to implement this API, but third-party plugins may behave unexpectedly if they do not override this new method.