Updated: Comment #12
Since this patch touches Drupal.attachBehaviors that would result in a big impact for frontend performance.
$.each() also changes the loop scope and does not filter properties which causes bugs for example in autocomplete.
As a proposed resolution $.each() would be replaced by filtered for-loops.
User interface changes
Original report by [nod_]
And the views merge.
PASSED: [[SimpleTest]]: [MySQL] 58,429 pass(es).
PASSED: [[SimpleTest]]: [MySQL] 57,969 pass(es).
PASSED: [[SimpleTest]]: [MySQL] 57,571 pass(es).