=== DB.lua
==================================================================
--- DB.lua	(revision 19679)
+++ DB.lua	(local)
@@ -235,7 +235,11 @@
 	-- load last chunk
 	local lastKey = math.modf(self.last_chunk.count / BLOCK_SIZE)
 	if not self.store[lastKey] then
-		return lastKey * BLOCK_SIZE, BLOCK_SIZE
+		if lastKey * BLOCK_SIZE != self.last_chunk.count then
+			return lastKey * BLOCK_SIZE, BLOCK_SIZE
+		else
+			return lastKey * BLOCK_SIZE - 1, BLOCK_SIZE
+		end
 	end
 
 	-- otherwise load in the direction of scrolling