tazotodua

here another, better ticket –
https://core.trac.www.ads-software.com/ticket/37620#ticket

also, it doesnt return true when IS_ADMIN() is used in other plugins, whenever the login page renders..

I’ve considered to submit it to WP – https://core.trac.www.ads-software.com/ticket/37483#ticket

i’ve updated the question.

maybe you have cached them.
tried cleaning the cache?
to ensure, look if file resides /wp-content/cache or somewhere like that..

by 15.07.2016, it is not fixed by WordFence.

So,till that is fixed, you should do manual fix:
–uncheck “Prevent users registering ‘admin’ username if it doesn’t exist” from WordFence>Options

and in Wordfence plugin folder>lib>wordfenceClass.php , on line 1169, change this:
public static function registrationFilter($errors, $santizedLogin, $userEmail){

to
public static function registrationFilter($errors, $santizedLogin=false, $userEmail=false){

by 15.07.2016, it is not fixed by WordFence.

So,till that is fixed, you should do manual fix:
–uncheck “Prevent users registering ‘admin’ username if it doesn’t exist” from WordFence>Options

and in Wordfence plugin folder>lib>wordfenceClass.php , on line 1169, change this:
public static function registrationFilter($errors, $santizedLogin, $userEmail){

to
public static function registrationFilter($errors, $santizedLogin=false, $userEmail=false){

also,
/category/
/author/
/tag/
+ homepage

and etc.. which page/content are changeable frequently.

2) another sugestion:

adding classes can be done using javascript too.
for example, cache whole menu only once, and in wp_footer add the hook to determine current category/post/page/author… etc… if is included in NAV-menu, and if yes, then with javascript, add CLASSES or etc…