--- lpdf-pda.xml.orig 2014-07-03 01:41:32.224851125 +0200
+++ lpdf-pda.xml 2014-07-03 01:43:40.268845741 +0200
@@ -11,7 +11,11 @@
                     <rdf:li/>
                 </rdf:Seq>
             </dc:creator>
-            <dc:description/>
+            <dc:description>
+                 <rdf:Alt>
+                  <rdf:li xml:lang="x-default"/>      
+                 </rdf:Alt>
+            </dc:description> 
             <dc:title>
                 <rdf:Alt>
                     <rdf:li xml:lang="x-default"/>

--- lpdf-pdx.xml.orig 2014-07-03 01:41:38.284850871 +0200
+++ lpdf-pdx.xml 2014-07-03 01:46:07.452839551 +0200
@@ -11,7 +11,11 @@
                     <rdf:li/>
                 </rdf:Seq>
             </dc:creator>
-            <dc:description/>
+            <dc:description>
+                <rdf:Alt>
+                    <rdf:li xml:lang="x-default"/>
+                </rdf:Alt>
+            </dc:description>
             <dc:title>
                 <rdf:Alt>
                     <rdf:li xml:lang="x-default"/>

--- lpdf-xmp.lua.orig 2014-07-03 12:19:37.283241070 +0200
+++ lpdf-xmp.lua 2014-07-03 12:19:45.915240707 +0200
@@ -50,7 +50,7 @@
     -- Dublin Core schema
     ["Author"]          = "rdf:Description/dc:creator/rdf:Seq/rdf:li",
     ["Format"]          = "rdf:Description/dc:format", -- optional, but nice to have
-    ["Subject"]         = "rdf:Description/dc:description",
+    ["Subject"]         = "rdf:Description/dc:description/rdf:Alt/rdf:li",
     ["Title"]           = "rdf:Description/dc:title/rdf:Alt/rdf:li",
     -- XMP Basic schema
     ["CreateDate"]      = "rdf:Description/xmp:CreateDate",


checked with acrobat pro trial xi, it's ok.

--
luigi