Username with dots

[threadi]

If a username contains a dot (e.g. "my.name") its impossible to save settings for this user.

Cause:
The HTML-Code is run through the renderer which converts "my.name" to "my_name" for the input-hidden-field.
After submitting the form the code checks for the unrendered username.

if (!$disabled && $_POST["id_" . $post_name]) {
                            if ($_POST[$post_chk]) {

My Solution for the moment: adding 2 lines before the POST is checked,

$post_name = str_replace(".", "_", $name);
$post_chk = str_replace(".", "_", $chk);
if (!$disabled && $_POST["id_" . $post_name]) {
                            if ($_POST[$post_chk]) { [..]

[shimmtak]

I struggled the same issue all day long, and confirmed the solution was work.
I tried the plugin with Hogfather and it worked fine (without this issue).