--- a/render_slices.h	Mon Jun 09 18:58:39 2008 +0300
+++ b/render_slices.h	Tue Jun 17 16:39:55 2008 +0300
@@ -57,6 +57,8 @@
  */
 #define SLICE_PROCESS_ROW 0x02
 
+// XXX: you can't modify the slice's row buffer until these return SLICE_CONTINUE
+
 /*
  * The render_buf for the render_slice_info with the given index value contains
  * the full information for the next row of the render_info render. Returns a