diff -u b/includes/errors.inc b/includes/errors.inc
--- b/includes/errors.inc
+++ b/includes/errors.inc
@@ -428,17 +428,20 @@
                 if ($show_non_scalar && $call_depth >= $start_vars_non_scalar && $call_depth <= $stop_vars_non_scalar) {
                   if (!empty($output_buffering)) {
                     ob_start();
-                    var_dump($arg); // Handles recursion so do it this way if possible.
+                    // Handles recursion so do it this way if possible.
+                    var_dump($arg);
                     $var = ob_get_clean();
                   }
                   else {
-                    $var = @var_export($arg, TRUE); // '@' = Suppress the "does not handle recursion" warnings.
+                    // '@' = Suppress the "does not handle recursion" warnings.
+                    $var = @var_export($arg, TRUE);
                   }
                   $data .= _format_backtrace_fmt_var($var, $max_len_non_scalar);
                 }
               }
             }
-            $data = strlen($data) ? substr($data, 0, -4) : ' '; // Remove <br> off end of last var.
+            // Remove <br> off end of last var.
+            $data = strlen($data) ? substr($data, 0, -4) : ' ';
             $cs .= "<td class=\"var-cell\">$data</td>";
             break;
 
@@ -518,7 +521,8 @@
         border-top: 1px solid;
       }
       .backtrace .var-cell {
-        border: 1px dotted; width: 30%;
+        border: 1px dotted; 
+        width: 30%;
       };
       pre.backtrace {
         font-family: "Andale Mono","Courier New",Courier,Lucidatypewriter,Fixed,monospace;
diff -u b/modules/dblog/dblog.module b/modules/dblog/dblog.module
--- b/modules/dblog/dblog.module
+++ b/modules/dblog/dblog.module
@@ -152,19 +152,15 @@
     if (!array_has_PDOException($log_entry)) {
       Database::getConnection('default', 'default')->insert('watchdog')
         ->fields(array(
-          'uid'       => $log_entry['uid'],
-          'type'      => drupal_substr($log_entry['type'], 0, 64),
-          'message'   => $log_entry['message'],
+          'uid' => $log_entry['uid'],
+          'type' => drupal_substr($log_entry['type'], 0, 64),
+          'message' => $log_entry['message'],
           'variables' => serialize($log_entry['variables']),
-          'severity'  => $log_entry['severity'],
-          // Do not use substr() on link as it can split a UTF-8 character 
-          // making the string an invalid multibyte string and the record will
-          // likely be rejected by the database. E.g., the $link variable in
-          // DrupalWebTestCase->generateLogEntries().
-          'link'      => drupal_substr($log_entry['link'], 0, 255),
-          'location'  => $log_entry['request_uri'],
-          'referer'   => $log_entry['referer'],
-          'hostname'  => drupal_substr($log_entry['ip'], 0, 128),
+          'severity' => $log_entry['severity'],
+          'link' => drupal_substr($log_entry['link'], 0, 255),
+          'location' => $log_entry['request_uri'],
+          'referer' => $log_entry['referer'],
+          'hostname' => drupal_substr($log_entry['ip'], 0, 128),
           'timestamp' => $log_entry['timestamp'],
         ))
         ->execute();