diff -r b0affce7beb1 -r 06160a812d43 Source/Grid.m
--- a/Source/Grid.m	Tue Mar 10 22:36:23 2009 -0700
+++ b/Source/Grid.m	Tue Jul 07 08:44:33 2009 -0700
@@ -387,9 +387,11 @@
     // To make the bitTransform relative to my center, I need to offset the center to the origin
     // first, and then back afterwards.
     CGSize size = self.bounds.size;
-    CATransform3D x = CATransform3DMakeTranslation(-size.width/2, -size.height/2,0);
+    size.width = roundf(size.width/2.0);
+    size.height = roundf(size.height/2.0);
+    CATransform3D x = CATransform3DMakeTranslation(-size.width, -size.height, 0);
     x = CATransform3DConcat(x, bitTransform);
-    x = CATransform3DConcat(x, CATransform3DMakeTranslation(size.width/2, size.height/2,0));
+    x = CATransform3DConcat(x, CATransform3DMakeTranslation(size.width, size.height ,0));
     self.sublayerTransform = x;    
 }