diff --git a/lang/en/admin.php b/lang/en/admin.php
index c8038b29ac3..f480d4dadce 100644
--- a/lang/en/admin.php
+++ b/lang/en/admin.php
@@ -975,7 +975,8 @@ $string['profilerequired'] = 'Is this field required?';
 $string['profileroles'] = 'Profile visible roles';
 $string['profilesforenrolledusersonly'] = 'Profiles for enrolled users only';
 $string['profileshortname'] = 'Short name (must be unique)';
-$string['profileshortnameinvalid'] = 'This short name can only contain alphanumeric characters (letters and numbers) or underscore (_).';
+$string['profileshortnameinvalid'] = 'This short name can only contain alphanumeric characters (lowercase letters and numbers) or underscore (_).';
+$string['profileshortname_help'] = 'This short name can only contain alphanumeric characters (lowercase letters and numbers) or underscore (_).';
 $string['profileshortnamenotunique'] = 'This short name is already in use';
 $string['profilesignup'] = 'Display on signup page?';
 $string['profilespecificsettings'] = 'Specific settings';
diff --git a/user/profile/definelib.php b/user/profile/definelib.php
index 37ae8f5f2be..d6d394e87bf 100644
--- a/user/profile/definelib.php
+++ b/user/profile/definelib.php
@@ -55,6 +55,8 @@ class profile_define_base {
         // but we are accepting any PARAM_TEXT value here,
         // and checking [a-zA-Z0-9_] pattern in define_validate_common() function to throw an error when needed.
         $form->addElement('text', 'shortname', get_string('profileshortname', 'admin'), 'maxlength="100" size="25"');
+        $form->addHelpButton('shortname', 'profileshortname', 'admin');
+
         $form->addRule('shortname', $strrequired, 'required', null, 'client');
         $form->setType('shortname', PARAM_TEXT);
 
@@ -131,8 +133,9 @@ class profile_define_base {
             $err['shortname'] = get_string('required');
 
         } else {
+            // '/^[a-z0-9_]+$/' this is the porposed change for this bug.
             // Check allowed pattern (numbers, letters and underscore).
-            if (!preg_match('/^[a-zA-Z0-9_]+$/', $data->shortname)) {
+            if (!preg_match('/^[a-z0-9_]+$/', $data->shortname)) {
                 $err['shortname'] = get_string('profileshortnameinvalid', 'admin');
             } else {
                 // Fetch field-record from DB.
diff --git a/user/profile/lib.php b/user/profile/lib.php
index c82551f99c1..8b4ac6823de 100644
--- a/user/profile/lib.php
+++ b/user/profile/lib.php
@@ -770,7 +770,8 @@ function profile_user_record($userid, $onlyinuserobject = true) {
     $fields = profile_get_user_fields_with_data($userid);
     foreach ($fields as $formfield) {
         if (!$onlyinuserobject || $formfield->is_user_object_data()) {
-            $usercustomfields->{$formfield->field->shortname} = $formfield->data;
+            $usercustomfields->{$formfield->field->shortname} = //$formfield->data;
+            core_text::strtolower($formfield->data);
         }
     }