id	summary	reporter	owner	description	type	status	priority	milestone	component	version	severity	resolution	keywords	cc
11753	3.0 upgrader needs to lowercase usernames	Denis-de-Bernardy		"I'm opening this in advance so we don't forget. ms-default-filters.php has the following filter:

{{{
add_action ( 'sanitize_user', 'strtolower_usernames', 10, 3 );
}}}

after upgrading to 3.0, some users may end up wanting to turn their existing sites in a Multisite install. In the event this happens, we should:

 - fix the strtolower_usernames() function if needed (see #11751)
 - lowercase all usernames accordingly
 - double check that previous logins still work (they should work fine, see #5472)"	defect (bug)	closed	normal	3.0	General	3.0	major	fixed	multisite