diff --git a/lime.py b/lime.py
index e7daaa7..0ca8ca3 100644
--- a/lime.py
+++ b/lime.py
@@ -49,8 +49,9 @@ def __init__(self, file, datacallback=None, debug=False):
             self.read_children(file, self.size)
         elif datacallback:
             datacallback(self, file)
+            datacallback(self.size, file)
         else:
-            file.seek(self.size, 1)
+            file.seek(self.size, 2)
 
     def read_children(self, file, stop):
         start = file.tell()