diff --git a/scripts/schhist2web b/scripts/schhist2web
index 5f71df6..192e000 100755
--- a/scripts/schhist2web
+++ b/scripts/schhist2web
@@ -157,7 +157,7 @@ if [ -z "$head" ]; then
     exit 1
 fi
 
-ppmmake '#e0e0e0' 5 20 | pnmtopng >"$out"/unchanged.png
+ppmmake '#e0e0e0' 5 30 | pnmtopng >"$out"/unchanged.png
 
 index="$out/index.html"
 {
@@ -210,12 +210,12 @@ for n in `cd "$dir" && git rev-list $first..HEAD~1` $first; do
 	elif [ -f "$a" ]; then
 	    s="$s<TD>"
 	    pngdiff cat "$diff" -f -c 1,0,0 "$a" "$a" || exit
-	    pngdiff shrink "$thumb" -f -c 1,0,0 $THUMB_OPTS "$fat_a" "$fat_a" \
+	    pngdiff shrink "$thumb" -f $THUMB_OPTS -c 1,0,0 "$fat_a" "$fat_a" \
 	      || exit
 	elif [ -f "$b" ]; then
 	    s="$s<TD>"
 	    pngdiff cat "$diff" -f -c 0,1,0 "$b" "$b" || exit
-	    pngdiff shrink "$thumb" -f -c 0,1,0 $THUMB_OPTS "$fat_b" "$fat_b" \
+	    pngdiff shrink "$thumb" -f $THUMB_OPTS -c 0,1,0 "$fat_b" "$fat_b" \
 	      || exit
 	else
 	    s="$s<TD>"