diff --git a/script/device/Image.py b/script/device/Image.py
index 581c859..10d01d3 100644
--- a/script/device/Image.py
+++ b/script/device/Image.py
@@ -102,6 +102,7 @@ class Image(DeviceBase, Readable):
 
         self.image_lock.acquire(True)
         try:            
+            print "  -> ", filename,  self.last_filename
             if filename == self.last_filename:
                 return self.last_image
             #elif filename == self.current_reading: