Issue #2140157 by rbp, jhodgdon, joachim: menu return constants not properly explained - MENU_NOT_FOUND, MENU_ACCESS_DENIED

Issue #2510674 by er.pushpinderrana, joachim, cilefen: menu_get_item() should say that $path is optional and what the default is

Issue #1973262 by cilefen, Matt V., David_Rothstein, Anybody, Rob230: User pages display incorrect title instead of "Menu link title" when link paths are added to a default menus

Issue #2425259 by catch, sidharrell, nlisgo, Josh Waihi, Fabianx, Berdir, martin107: Router rebuild lock_wait() condition can result in rebuild later in the request (race condition)

Issue #1854134 by EtienneRd, jeffam | dolu: Added a query tag to the query in menu_link_get_preferred() to allow modules to alter the query.

Issue #2027351 by micnap, longwave, helenkim: Fix up grammar and awkward parens in API docs in menu.inc

Issue #1847382 by thehong, pingwin4eg, 63reasons: Fixed Undefined index: access in includes/menu.inc (when custom access_callback() does not exist or does not get included).

Issue #1516030 by valthebald, rdickert: Fixed Change parenthesis in menu_link_save() to express intended order of operations.

Issue #918356 by David_Rothstein, franz, tekante, dstol, mikestefff: Fixed WSOD when drupal_get_title() called during hook_init() and custom 403 or 404 pages are being used.

Issue #1338282 by Damien Tournoud, zymsys, JamesOakley, pillarsdotnet, chx: Fixed php notice in menu_link_save().

Issue #1425280 by Niklas Fiekas, swentel: Fixed No contextual links in node lists after a node without contextual links.

Issue #942782 by pillarsdotnet, xjm, becw, timhilliard, JohnAlbin, jrchamp, Tor Arne Thune, Damien Tournoud, jn2, James Andres, dstol, melon, colan: Fixed Custom menus never receive an active trail.

Issue #520106 by JohnAlbin, pillarsdotnet, chx, sun, Nick Lewis, drifter, Mark Trapp: Fixed No way to dynamically set active trail.

Issue #898634 by catch, alex_b, chx: Fixed install_drupal(): call to menu-touching functions results in SQL syntax error.

Issue #1001146 by edhaber, droplet: Fixed Cannot theme links in a menu when menu_name() contains a hyphen.

- Patch #965272 by larowlan, bellHead, TR: items defined with type MENU_CALLBACK show 'Home' as a title.

Issue #749992 by jhodgdon: menu system / menu module distinction is not obvious to folks new to Drupal.