Ensure that unquoted attribute selectors are quoted (allowing them to go into qSA/matchesSelector properly). Fixes #7216.

Make sure that if an additional load event is triggered (such as an iframe being dynamically injected in DOM ready) the ready event isn't triggered twice. Fixes #7352.

Make sure that when multiple variables are being declared that assignments are each done on their own line.

Opera doesn't give height/width of display: none elements with getComputedStyle but does with currentStyle - fall back to that if it exists.

Make sure that accessing computed CSS for elements returns 'auto' instead of '' consistently. Fixes #7337.

For .show() with no arguments, only set display of elements in the second loop if they don't have style.display already set or if style.display isn't none. Fixes #7315.

Allow DELETE requests to have a content body, and properly serialize data to the url for HEAD requests. Fixes #7285.

Moved jQuery.props to attributes since it was only used in support. Fixes #6897 - suggestion by dmethvin

Make sure that .width()/.height() don't return NaN also standardize on returning  instead of auto for default values (which is what we do elsewhere in .css() as well). Fixes #7225.