- Patch #432128 by Berdir: adding some babysitting code to insert queries -- don't execute query when there are no values.

- Patch #385602 by Damien Tournoud, desbeers, Gabor Hojtsy: log message sometimes lost on node preview. With a test\!

- Patch #394594 by ksenzee: converted most of the user module code to the new database abstraction layer.

#323112 follow-up by kkaefer: Make tab titles enclosed in <strong> tags to indicate importance from surrounding text.

#323112 follow-up by yched: Oops, Vertical Tabs broke field widgets (with tests so we don't do it again).

#323112 by dmitrig01, kkaefer, quicksketch, frando and many many more: Now presenting... Vertical Tabs. Fantastic new UI improvement for node forms and hopefully more in the future.

- Patch #424252 by swentel: move block cache settings from system module to block module now block module is optional.

- Patch #422824 by Gabor: add more specific body classes so page elements can be themed based on page type. Clean-up of existing code.

- Patch #392362 by Xano, Dave Reid: remove clean URL option from the installation process -- automatically enable clean URLs when possible, or hide the option when clean URLs cannot be enabled.