- Patch #676800 by casey, sun, james.elliott, cosmicdreams, seutje, Jacine: made fieldsets work on all browser.

#678714 by effulgentsia: Unify use of theme hook / template suggestions, fix clobbering problems, and improve suggestion discovery performance.

- Patch #115540 by Wesley Tanaka, douggreen, WorldFallz, dww: 'no results' page was not themeable, and generated invalid HTML.

- Patch #572618 by effulgentsia, pwolanin, sun: all theme functions should take a single argument. Code clean-up and performance improvement. Woot.

- Patch #511748 by moshe weitzman: pushing rending to later in the cycle so there is more room for customization.

- Patch #245115 by kkaefer, John Morahan, JohnAlbin et al: after a long discussion we've decided to make the concatenation operator consistent with the other operators.

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

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