diff --git a/ChangeLog b/ChangeLog
index f7e5635..46acbc0 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+bzr branch lp:libisofs/for-libisoburn (to become libisofs-1.3.2.tar.gz)
+===============================================================================
+* The sort weight of data files loaded from ISO image is now 2 exp 28 to 1
+  rather than 2 exp 31 - 1 to - 2 exp 31
+
+
 libisofs-1.3.0.tar.gz Fri May 17 2013
 ===============================================================================
 * Bug fix: GPT header CRC was computed from all 512 bytes rather than from 92.
diff --git a/libisofs/fs_image.c b/libisofs/fs_image.c
index 7a9d185..79b3cba 100644
--- a/libisofs/fs_image.c
+++ b/libisofs/fs_image.c
@@ -3104,8 +3104,19 @@ int image_builder_create_node(IsoNodeBuilder *builder, IsoImage *image,
                 /*
                  * and we set the sort weight based on the block on image, to
                  * improve performance on image modifying.
+                 *
+                 * This was too obtrusive because it occupied the highest
+                 * possible weight ranks:
+                 *     file->sort_weight = INT_MAX - data->sections[0].block;
+                 *
+                 * So a try to be more nice and rely on caching with tiles
+                 * of at least 16 blocks. This occupies a range within
+                 * the interval of 1 to 2 exp 28 = 268,435,456.
+                 * (Dividing each number separately saves from integer
+                 *  rollover problems.)
                  */
-                file->sort_weight = INT_MAX - data->sections[0].block;
+                file->sort_weight =
+                       fsdata->nblocks / 16 - data->sections[0].block / 16 + 1;
 
                 file->stream = stream;
                 file->node.type = LIBISO_FILE;