--- CV/CV.xs	2005/02/08 11:00:11	1.12
+++ CV/CV.xs	2005/02/08 12:51:12	1.14
@@ -262,14 +262,18 @@
             char *hist;
 
             SV *histsv = newSV (257);
-            sv_upgrade (histsv, SVt_PV);
+            SvPOK_on (histsv);
             SvCUR_set (histsv, 256);
             hist = SvPVX (histsv);
 
             Zero (tmphist, 256, int);
 
+            j = len;
+
             while (len--)
-              ++tmphist[(unsigned char)*buf++];
+              ++tmphist[(unsigned char)*buf++ & 0xda];
+            
+            len = j;
 
             bigst = 1;
             for (j = 0; j < 256; ++j)
@@ -277,7 +281,7 @@
                 bigst = tmphist[j];
             
             for (j = 0; j < 256; ++j)
-              hist[j] = tmphist[j] * 255 / bigst;
+              hist[j] = tmphist[j] * 255 / (len == 0 ? 1 : len);//bigst;
 
             av_push (result, histsv);
           }