Issue #1446372 by Heine, bserem, champlin: Invalid Unicode code range in PREG_CLASS_UNICODE_WORD_BOUNDARY fails with PCRE 8.30.

Issue #1098556 by barbi, rocket_nova, kiamlaluno: search_box() documentation referred to theme_search_box_form() which is in fact implemented in search-block-form.tpl.php in Drupal 6

#638702 by jhodgdon: fix issues where the return value of db_affected_rows() was not properly considered

#280319 by robertDouglass: search_box_form_validate() is referenced in search form, but does not exist

#292565 second follow up by John Morahan: fix login destination again on 403/404 pages and make the search form work there if displayed

#376408 follow up by pwolanin: search_nodeapi() lacked break in switch; resulted in issue in logic not code flow

#376408 by ajevans85, pwolanin: Prevent an empty anchor tag and parenthesis appearing in the output for the search index in search_nodeapi()

#257912 by douggreen and Damien Tournoud: improve performance of search indexing by swapping two queries for the one which is successful more often

- Patch #293504 by Damien Tournoud: fixed search on PostgreSQL - argument of AND must be type boolean, not type integer.

#218403 by dmaz: avoid duplication in search index, when the database collation makes the words collide (critical)

#205199 by David_Rothstein: leftover links were not removed in the reindexing process properly (search module)

#197730 by keith.smith: standardize on a much more user friendly cron reference in help texts, explain its importance with more examples in INSTALL.txt

#200069 by keith.smith: new standard for 'more information' links in module help texts, as the handbook we referred to before was renamed

#197297 by DanW (as GHOP 17), and keith.smith: clean up lots of help texts, update to drag and drop functionality, drupal.module removal, etc

 - whitespaces at end of lines
 - indentation
 - control structure usage
 - whitespace in empty lines
 - phpdoc comment formatting

security fixes forward ported from Drupal 5.2 - previously not committed parts of http://drupal.org/cvs?commit=74833

#186242 by douggreen: ignore AND in search, as it is the default behavior and inform the user when a lower case 'or' is used that 'OR' should be used as an operator

- Patch #164032 by Crell, Chris Kennedy, dmitrig01, WimLeers, dvessel et al: tpl-ified the search module.

#184867 by deekayen, catch and keith.smith: fix some spelling errors in our source code and messages printed

#180897 by sun and dvessel: fix various XHTML validity issues in Drupal by closing unclosed tags, avoiding empty table containers, and so on