diff --git lib/python2.4/site-packages/roundup/cgi/ZTUtils/Batch.py lib/python2.4/site-packages/roundup/cgi/ZTUtils/Batch.py
index 66dde68..79d8d7d 100644
--- lib/python2.4/site-packages/roundup/cgi/ZTUtils/Batch.py
+++ lib/python2.4/site-packages/roundup/cgi/ZTUtils/Batch.py
@@ -67,8 +67,7 @@ class Batch:
         start,end,sz = opt(start,end,size,orphan,sequence)
 
         self._sequence = sequence
-        self.size = sz
-        self._size = size
+        self.size = size
         self.start = start
         self.end = end
         self.orphan = orphan
@@ -92,7 +91,9 @@ class Batch:
 
 def opt(start,end,size,orphan,sequence):
     if size < 1:
-        if start > 0 and end > 0 and end >= start:
+        if size == 0:
+            size=len(sequence)
+        elif start > 0 and end > 0 and end >= start:
             size=end+1-start
         else: size=7
 
diff --git lib/python2.4/site-packages/roundup/cgi/templating.py lib/python2.4/site-packages/roundup/cgi/templating.py
index deacc88..e839321 100644
--- lib/python2.4/site-packages/roundup/cgi/templating.py
+++ lib/python2.4/site-packages/roundup/cgi/templating.py
@@ -2812,8 +2812,11 @@ class Batch(ZTUtils.Batch):
     def previous(self):
         if self.start == 1:
             return None
-        return Batch(self.client, self._sequence, self._size,
-            self.first - self._size + self.overlap, 0, self.orphan,
+        if self.size == 0:
+            return Batch(self.client, self._sequence, self.size,
+                0, 0, self.orphan, self.overlap)
+        return Batch(self.client, self._sequence, self.size,
+            self.first - self.size + self.overlap, 0, self.orphan,
             self.overlap)
 
     def next(self):
@@ -2821,7 +2824,7 @@ class Batch(ZTUtils.Batch):
             self._sequence[self.end]
         except IndexError:
             return None
-        return Batch(self.client, self._sequence, self._size,
+        return Batch(self.client, self._sequence, self.size,
             self.end - self.overlap, 0, self.orphan, self.overlap)
 
 class TemplatingUtils: