2 files changed, 14 insertions, 1 deletions
diff --git a/classes/File.php b/classes/File.php
index 533cc6e71..289c6e441 100644
--- a/classes/File.php
+++ b/classes/File.php
@@ -193,5 +193,18 @@ class File extends Memcached_DataObject
 
         return 'http://'.$server.$path.$filename;
     }
+
+    function isEnclosure(){
+        if(isset($this->filename)){
+            return true;
+        }
+        $notEnclosureMimeTypes = array('text/html');
+        $mimetype = strtolower($this->mimetype);
+        $semicolon = strpos($mimetype,';');
+        if($semicolon){
+            $mimetype = substr($mimetype,0,$semicolon);
+        }
+        return(! in_array($mimetype,$notEnclosureMimeTypes));
+    }
 }
 
diff --git a/classes/Notice.php b/classes/Notice.php
index fc28f3558..08125cf7b 100644
--- a/classes/Notice.php
+++ b/classes/Notice.php
@@ -1170,7 +1170,7 @@ class Notice extends Memcached_DataObject
         $attachments = $this->attachments();
         if($attachments){
             foreach($attachments as $attachment){
-                if (isset($attachment->filename)) {
+                if ($attachment->isEnclosure()) {
                     $attributes = array('rel'=>'enclosure','href'=>$attachment->url,'type'=>$attachment->mimetype,'length'=>$attachment->size);
                     if($attachment->title){
                         $attributes['title']=$attachment->title;