Issue #1891228 by eiriksm, logaritmisk, joelpittet, stefan.r, StefanPr, mariancalinro: image_style_deliver can create invalid headers

Issue #2480805 by JacobSanford, eiriksm, jhodgdon: The function doc block for image_style_deliver is missing a parameter

Issue #1934498 by attiks, David_Rothstein, KhaledBlah, tstoeckler, julien_acti, helmo, effulgentsia, Jelle_S, jcisio: Allow the image style 'itok' token to be suppressed in image derivative URLs

Issue #927138 by manarth, handrus, rasmusluckow, douggreen, .John, Taz, David_Rothstein, droplet, webchick, marcingy: Fail image generation with 404 instead of 500, when source file is missing.

Issue #1099732 by joshi.rohit100, droplet | Chi: Fixed Incorrect encoding for error pages in image_style_deliver().

Issue #2037847 by droplet: Join position strings together to fix translatability in the administrative interface for the Image module "Crop" effect.

Issue #1426122 by deletedaccount, Alan D., andypost, maximpodorov: Some callbacks return junk when calling drupal_not_found(); replace with return MENU_NOT_FOUND instead.

Issue #1955378 by skek, Darren Oh, claudiu.cristea, David_Rothstein: Return same derivative token with path or URI.

Issue #1057656 by mondrake, chx | adrinux: Fixed Image styles don't flush for images stored non-default schemes.

Issue #606598 by andypost, BarisW, stBorchert, David_Rothstein, sun, aspilicious, joachim, danielbeeke2, Sutharsan: Added human readable labels to image styles.

Issue #1229014 by bfroehle, jackbravo, illmasterc: Fixed Content-Disposition header makes private files show open/save prompts, but public files show inline.

Issue #1934568 by David_Rothstein, pwolanin: Allow sites using the 'image_allow_insecure_derivatives' variable to have partial protection from the security issues fixed in Drupal 7.20.

Issue #1923554 by David_Rothstein, pwolanin, mitron | alfaguru: Fixed New anti-DoS measure breaks for some file URIs.

Issue #1397346 by Albert Volkman, kristiaanvandeneynde, larowlan, bobbyaldol, tim-e, shiff2kl, FatGuyLaughing: Add and fix up documentation in image and node module files

Issue #1550892 by david.mckay | fgm: Fixed reset() on function call in image_update_7002() to avoid an E_STRICT notice.

Issue #1833028 by michaelmol | rmfleet: Fixed bug which prevented image styles from being reverted on PHP 5.4.

Issue #1038932 by tim.plunkett, Chris Gillis: Theme_image_formatter() assumes that title, alt, and options are always set.

Issue #1773032 by Jorrit: Fixed Non-standard and pointless name attribute added to Content-Type header.

Issue #1615312 by dsdeiz, David_Rothstein: Make sure all D7 to D7 updates are listed in the updates-7.x-extra group

Issue #1614292 by brockjo, Albert Volkman | neclimdul: Fixed image_style_delete_form() doesn't take form_state() by reference (prevented image styles from being deleted on PHP 5.4).

Issue #1558548 by tim.plunkett, sun: Fixed Notice: Undefined index: default_image() in image_field_prepare_view().

Issue #751168 by elliotttf, caktux, andyceo, setvik, xjm, sun, tim.plunkett: Fixed Regression: Missing 'Default image' per field instance.

Issue #1398740 by TravisCarden: Fixed Typo in status message: 'The %style has been revert to its defaults.'.

Issue #1357072 by dkingofpa: Fixed Call to undefined function _update_7000_field_read_fields() in image.install during upgrade.