diff --git a/theme/nonzero/layout/frontpage.php b/theme/nonzero/layout/frontpage.php
index a53c48a8183..b0abe41fb62 100644
--- a/theme/nonzero/layout/frontpage.php
+++ b/theme/nonzero/layout/frontpage.php
@@ -1,4 +1,26 @@
 <?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * The frontpage layout.
+ *
+ * @package   theme_nonzero
+ * @copyright 2010 Patrick Malley
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 
 $hasheading = ($PAGE->heading);
 $hasnavbar = (empty($PAGE->layout_options['nonavbar']) && $PAGE->has_navbar());
diff --git a/theme/nonzero/layout/general.php b/theme/nonzero/layout/general.php
index 097a21fce60..9cda44ca58d 100644
--- a/theme/nonzero/layout/general.php
+++ b/theme/nonzero/layout/general.php
@@ -1,4 +1,26 @@
 <?php
+// This file is part of Moodle - http://moodle.org/
+//
+// Moodle is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+//
+// Moodle is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
+
+/**
+ * The default layout.
+ *
+ * @package   theme_nonzero
+ * @copyright 2010 Patrick Malley
+ * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
+ */
 
 $hasheading = ($PAGE->heading);
 $hasnavbar = (empty($PAGE->layout_options['nonavbar']) && $PAGE->has_navbar());
diff --git a/theme/nonzero/lib.php b/theme/nonzero/lib.php
index e119d76b45d..a97045c8077 100644
--- a/theme/nonzero/lib.php
+++ b/theme/nonzero/lib.php
@@ -29,8 +29,7 @@
 
 function nonzero_process_css($css, $theme) {
 
-
-    // Set the region-pre and region-post widths
+    // Set the region-pre and region-post widths.
     if (!empty($theme->settings->regionprewidth) && !empty($theme->settings->regionpostwidth)) {
         $regionprewidth = $theme->settings->regionprewidth;
         $regionpostwidth = $theme->settings->regionpostwidth;
@@ -40,8 +39,7 @@ function nonzero_process_css($css, $theme) {
     }
     $css = nonzero_set_regionwidths($css, $regionprewidth, $regionpostwidth);
 
-
-    // Set the custom CSS
+    // Set the custom CSS.
     if (!empty($theme->settings->customcss)) {
         $customcss = $theme->settings->customcss;
     } else {
@@ -49,7 +47,7 @@ function nonzero_process_css($css, $theme) {
     }
     $css = nonzero_set_customcss($css, $customcss);
 
-    // Return the CSS
+    // Return the CSS.
     return $css;
 }
 
@@ -57,10 +55,10 @@ function nonzero_process_css($css, $theme) {
  * Sets the region width variable in CSS
  *
  * @param string $css
- * @param mixed $regionwidth
+ * @param string $regionprewidth
+ * @param string $regionpostwidth
  * @return string
  */
-
 function nonzero_set_regionwidths($css, $regionprewidth, $regionpostwidth) {
     $tag1 = '[[setting:regionprewidth]]';
     $tag2 = '[[setting:regionpostwidth]]';
@@ -74,20 +72,18 @@ function nonzero_set_regionwidths($css, $regionprewidth, $regionpostwidth) {
     }
     $css = str_replace($tag1, $replacement1.'px', $css);
     $css = str_replace($tag2, $replacement2.'px', $css);
-    $css = str_replace($tag3, ($replacement1+$replacement2).'px', $css);
-    $css = str_replace($tag4, (2*$replacement1+$replacement2).'px', $css);
+    $css = str_replace($tag3, ($replacement1 + $replacement2).'px', $css);
+    $css = str_replace($tag4, (2 * $replacement1 + $replacement2).'px', $css);
     return $css;
 }
 
-
 /**
  * Sets the custom css variable in CSS
  *
  * @param string $css
- * @param mixed $customcss
+ * @param string $customcss
  * @return string
  */
-
 function nonzero_set_customcss($css, $customcss) {
     $tag = '[[setting:customcss]]';
     $replacement = $customcss;
diff --git a/theme/nonzero/settings.php b/theme/nonzero/settings.php
index 1b38d4fb42b..68e52a07be4 100644
--- a/theme/nonzero/settings.php
+++ b/theme/nonzero/settings.php
@@ -30,7 +30,7 @@
 defined('MOODLE_INTERNAL') || die;
 
 if ($ADMIN->fulltree) {
-    // Block region-pre width
+    // Block region-pre width.
     $name = 'theme_nonzero/regionprewidth';
     $title = get_string('regionprewidth','theme_nonzero');
     $description = get_string('regionprewidthdesc', 'theme_nonzero');
@@ -40,7 +40,7 @@ if ($ADMIN->fulltree) {
     $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
-    // Block region-post width
+    // Block region-post width.
     $name = 'theme_nonzero/regionpostwidth';
     $title = get_string('regionpostwidth','theme_nonzero');
     $description = get_string('regionpostwidthdesc', 'theme_nonzero');
@@ -50,7 +50,7 @@ if ($ADMIN->fulltree) {
     $setting->set_updatedcallback('theme_reset_all_caches');
     $settings->add($setting);
 
-    // Custom CSS file
+    // Custom CSS file.
     $name = 'theme_nonzero/customcss';
     $title = get_string('customcss','theme_nonzero');
     $description = get_string('customcssdesc', 'theme_nonzero');