diff --git a/src/calibre/devices/prs505/driver.py b/src/calibre/devices/prs505/driver.py
index 09288aaa14..071d651186 100644
--- a/src/calibre/devices/prs505/driver.py
+++ b/src/calibre/devices/prs505/driver.py
@@ -147,7 +147,7 @@ class PRS505(USBMS):
         if opts.extra_customization:
             collections = [x.strip() for x in
                     opts.extra_customization.split(',')]
-
+        debug_print('PRS505: collection fields:', collections)
         c.update(blists, collections)
         c.write()
 
diff --git a/src/calibre/devices/prs505/sony_cache.py b/src/calibre/devices/prs505/sony_cache.py
index 71e7b9cff3..5542e28d90 100644
--- a/src/calibre/devices/prs505/sony_cache.py
+++ b/src/calibre/devices/prs505/sony_cache.py
@@ -540,10 +540,10 @@ class XMLCache(object):
                         break
                 self.namespaces[i] = ns
 
-        if DEBUG:
-            debug_print('Found nsmaps:')
-            pprint(self.nsmaps)
-            debug_print('Found namespaces:')
-            pprint(self.namespaces)
+#        if DEBUG:
+#            debug_print('Found nsmaps:')
+#            pprint(self.nsmaps)
+#            debug_print('Found namespaces:')
+#            pprint(self.namespaces)
     # }}}