id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
21446	plugins using curl with IPV6 enabled servers	mippie32		"
plugins using curl give problems on servers having both IPV4 and IPV6 network interfaces running. Basically the performance is poor because curl is timing out on the IPv6 address..  The workaround is:

add line:
curl_setopt( $handle, CURLOPT_IPRESOLVE, CURL_IPRESOLVE_V4);
in ../wp-includes/class-http.php

Why not have this set as default?
"	enhancement	new	normal	Awaiting Review	HTTP	3.4.1	normal		close