Issue #2168011 by xjm, jessebeach, Damien Tournoud, znerol, Xano: Remove all 7.x to 8.x update hooks and disallow updates from the previous major version.

Issue #2121849 by moshe weitzman: Move chmod.directory and chmod.file out of config and into settings so that file writes are independant of the config system.

Issue #2099467 by moshe weitzman, chx: Let non-interactive installers determine mode of files directory and its subdirectories.

Issue #2049465 by niko-, andypost, mradcliffe, claudiu.cristea, LinL: Fixed Upgrade of image styles and effects broken.

Issue #1969572 by neclimdul, larowlan, hussainweb, dawehner, damiankloip, ParisLiakos, pwieck, Berdir, socketwench: Make Uuid a service.

Issue #2015697 by claudiu.cristea, yched, Berdir, splatio: Convert field type to typed data plugin for file and image modules.

Rollback of Issue #1937140 by Berdir: image_jpeg_quality logically belongs to image toolkits, so will handle it as part of converting those to plugins.

Issue #1464554 by aspilicious, jhedstrom, sun, alexpott, disasm | heyrocker: Upgrade path for image style configuration.

- Patch #1471848 by BassistJimmyJam, michaellenahan: user interface text containing URLs in translated part.

Daniel Kudwien authored Feb 14, 2012 and Greg Dunlap committed Feb 14, 2012

- Config values are not casted to strings (despite promised).
- Config keys are not casted to strings (although promised, too).
- XML can be invalid and not parse-able for many reasons.
- Config keys are not validated/sanitized.
- config()->clear() should really be ->unset().
- Configuration must not be additionally cached by a module in any way (static cache / database cache).
- Some modules invoke drupal_alter() on configuration (e.g., image styles).
- Need a way to list config object names/suffixes _after_ a specified prefix.
- Need a way to determine whether a config object exists.
- Some modules might have a valid use-case for retrieving/listing config objects using a wildcard within the name (instead of only searching by prefix).
- The key of a retrieved value is unknown; since you only get the value.  Configuration values (or sub-values) may be passed forward to another function/callback, and thus, that function no longer knows about the key of the value. (unless the key is contained in the value, which is a very very wonky duplication)
- Config keys must not contain periods (within a specific key).

Issue #1353030 by BTMash, jenlampton, theborg: Added Increase length of "alt" and "title" text for images.

Nate Lampton authored Oct 30, 2011 and catch committed Nov 01, 2011

Issue #22336 by quicksketch, scor, boombatower, and rfay. Move all core Drupal files under a core subdirectory.

Issue #1129642 by jbrown: Fixed Populate HTML image tags with dimension attributes (like D6 imagefield) without re-introducing I/O.

Issue #758628 follow-up by jbrown, mgifford, nowarninglabel: Make GD library hook_requirements() desaturation and rotate errors into warnings..

- Patch #1097100 by quicksketch, boombatower, claar: remove all 7xxx update functions and tests (D6 to D7 upgrade path).

- Patch #933498 by eojthebrave, aaron: image effects table created with incorrect table name in upgrade path.

- Patch #902264 by Damien Tournoud: move hook_field_schema() to .install files so we can get the upgrade path to work.

- Patch #880132 by bojanz: hook_schema() doesn't support compound foreign keys; inconsistent implementations in core.

- Patch #690746 by jbrown, Ognyan Kulev, Crell, MichaelCole, Damien Tournoud: text column type doesn't reliably hold serialized variables.