Got this notice:

Notice: Only variables should be assigned by reference in /data/www/squirrelmail-devel/src/view_html.php on line 57
Warning: Cannot modify header information - headers already sent by (output started at /data/www/squirrelmail-devel/src/view_html.php:57) in /data/www/squirrelmail-devel/src/view_html.php on line 84

PHP 4.4.0-3 (Ubuntu 5.10 package)

This fix eliminates it.

src/view_html.php

@@ -54,9 +54,9 @@ $message = &$messages[$mbx_response['UIDVALIDITY']][$passed_id];
 if (!is_object($message)) {
     $message = sqimap_get_message($imap_stream, $passed_id, $mailbox);
 }
-$message_ent = &$message->getEntity($ent_id);
+$message_ent = $message->getEntity($ent_id);
 if ($passed_ent_id) {
-    $message = &$message->getEntity($passed_ent_id);
+    $message = $message->getEntity($passed_ent_id);
 }
 $header   = $message_ent->header;
 $type0    = $header->type0;
@@ -84,4 +84,4 @@ $body = MagicHTML( $body, $passed_id, $message, $mailbox);
 header('Content-Type: text/html; charset=' . $charset);
 echo $body;
 
-?>
+?>