Function: Callback formerly fired on the save_post hook. No longer needed.

Function: Check if the installed version of GD supports particular image type

Function: Converts an integer byte value to a shorthand byte value.

Function: Formerly used internally to tidy up the search terms.

Function: Determine if TinyMCE is available.

Function: Old callback for tag link tooltips.

Function: Remove image header support.

Function: Add callbacks for background image display.

Function: Remove custom background support.