http://sphinxsearch.com/docs/current.html#conf-sql-query-killlist

- #1562204 by markus_petrux - hook_sphinxsearch_xmlpipe_query_alter() is not invoked for delta indexes.

- #1527808 by markus_petrux - XMLPipe generation for delta, Warning: 1 duplicate document id pairs found.

- Allow external module detect errors and/or warnings during hook_sphinxsearch_api('pre_query') implementations.

- Allow execution of sphinx query, even when only custom filters and/or options have been specified.

- Add new panel available to Sphinx Administrators: Status information about the Sphinx searchd daemon.

- Integrate sphinxsearch_get_current_page() into sphinxsearch_parse_request() so paging can be controlled programmatically.

- Update the default port number used by Sphinx to reflect changes in offial package, using IANA assigned number since 0.9.9.

- Node types are now indexed as text fields (requires update.php and
  rebuilding sphinx indexes).