Okay – the login page is renamed.
The editor of the site is at one ip-address – if the lost password email is sent from there, the link in the email does not work: clicking the link in the email results in an errorpage with the text: “Your password reset link appears to be invalid. Please request a new link below”. Repeats will get the same result.
For now, the editor has to manage passwords for users manually, as they cannot do it themselves – which is not ideal.
If I log in, as the editor, from another ip – the email link in the lost password message is correct, and works as expected.
If the login page is changed back to /wp-login.php, everything works from both ips, the link in the email is fine.
I simply can′t see what is causing this…