--- pxljr-1.1/jccolor.c~	2006-12-31 21:31:48.000000000 +0100
+++ pxljr-1.1/jccolor.c	2008-11-11 19:11:26.000000000 +0100
@@ -225,7 +225,7 @@
 
   for (i = 0; i <= MAXJSAMPLE; i++) {
     rgb_ycc_tab[i+JR_HALF_OFF] = FIX(0.50000) * i + ONE_HALF;
-    rgb_ycc_tab[i+JR_MINUSHALF_OFF] = (-FIX(0.50000)) * i + CBCR_OFFSET ; /* -1 ? */
+    rgb_ycc_tab[i+JR_MINUSHALF_OFF] = (-FIX(0.50000)) * i + CBCR_OFFSET - 1;
   }
 }