Yet another problem with empty ID when accessing user/edit.php under PostgreSQL. definition_after_data() expects user ID to be stored in form hidden field but the value of the field is not set.

I can see two possible solutions, both of them to be fixed in user/edit_form.php
1) either in definition ()
$mform->addElement('hidden', 'id');
should be changed to
$mform->addElement('hidden', 'id', $USER->id); // do not forget to add global $USER

2) or in definition_after_data()
if ($user = get_record('user', 'id', $userid)) {
should be changed to
if (is_numeric($userid) && $user = get_record('user', 'id', $userid)) {

However, I was not able to find out why it works in 1.9 - hidden ID gets filled in $mform somewhen between definition() and definition_after_data(). That leads me to feeling that the origin of this problem is hidden somewhere else...