Index: support/support.module
===================================================================
--- support/support.module	(revision 144)
+++ support/support.module	(revision 156)
@@ -1288,6 +1288,15 @@
   for ($part = 2; $part <= $parts; $part++) {
     $attachment = imap_fetchbody($stream, $message, $part);
     $details = imap_bodystruct($stream, $message, $part);
+
+    // Decoding parameters (filename etc) from MIME-encoded text to UTF-8;
+    foreach ($details->parameters as $key => $object) {
+      $object->value = imap_utf8($object->value);
+    }
+    foreach ($details->dparameters as $key => $object) {
+      $object->value = imap_utf8($object->value);
+    }
+
     // Decode as necessary
     if ($details->encoding == ENCBASE64) {
       $attachment = imap_base64($attachment);