diff --git a/image/private/js-impl.js b/image/private/js-impl.js
index 3ee0ec3..532c286 100644
--- a/image/private/js-impl.js
+++ b/image/private/js-impl.js
@@ -78,6 +78,7 @@ var checkByte = plt.baselib.check.checkByte;
 var checkReal = plt.baselib.check.checkReal;
 var checkBoolean = plt.baselib.check.checkBoolean;
 
+var checkNatural = plt.baselib.check.checkNatural;
 var checkNonNegativeReal = plt.baselib.check.checkNonNegativeReal;
 
 
@@ -453,6 +454,8 @@ EXPORTS['beside'] =
 	    for (var i = 0; i < restImages.length; i++) {
 		img = makeOverlayImage(img, restImages[i], "beside", "middle");
             }
+
+            return img;
 	});
 
 
@@ -462,7 +465,7 @@ EXPORTS['beside/align'] =
         plt.baselib.arity.makeArityAtLeast(3),
         function(MACHINE) {
 	    var placeY = checkPlaceY(MACHINE, "beside/align", 0);
-	    var img1 = checkImage(MACHINE, "beside/align", "image", 1);
+	    var img1 = checkImage(MACHINE, "beside/align", 1);
 	    var img2 = checkImage(MACHINE, "beside/align", 2);
             var restImages = [];
             for (var i = 3; i < MACHINE.argcount; i++) {
@@ -870,7 +873,7 @@ EXPORTS['isosceles-triangle'] =
         4,
         function(MACHINE) {
 	    var side = checkNonNegativeReal(MACHINE, "isosceles-triangle", 0);
-	    var angle = checkAngle(MACHINE, "isosceles-triangle", 0);
+	    var angle = checkAngle(MACHINE, "isosceles-triangle", 1);
 	    var s = checkMode(MACHINE, "isosceles-triangle", 2);
 	    var c = checkColor(MACHINE, "isosceles-triangle", 3);
 	    return makeTriangleImage(jsnums.toFixnum(side), 
@@ -978,7 +981,7 @@ EXPORTS['color-list->image'] =
         'color-list->image',
         5,
         function(MACHINE) {
-            var listOfColors = checkListOfColor(MACHINE, 'color-list->image', 0);
+            var listOfColors = checkListofColor(MACHINE, 'color-list->image', 0);
 	    var width = checkNatural(MACHINE, 'color-list->image', 1);
 	    var height = checkNatural(MACHINE, 'color-list->image', 2);
 	    var pinholeX = checkNatural(MACHINE, 'color-list->image', 3);
diff --git a/image/private/kernel.js b/image/private/kernel.js
index 964f8d6..9d4e92b 100644
--- a/image/private/kernel.js
+++ b/image/private/kernel.js
@@ -1388,13 +1388,13 @@ LineImage.prototype.equals = function(other, aUnionFind) {
 
 var imageToColorList = function(img) {
     var width = img.getWidth(),
-        height = img.getHeight(),
-        canvas = makeCanvas(width, height),
-        ctx = canvas.getContext("2d"),
-        imageData,
-        data,
-        i,
-        r, g, b, a;
+    height = img.getHeight(),
+    canvas = makeCanvas(width, height),
+    ctx = canvas.getContext("2d"),
+    imageData,
+    data,
+    i,
+    r, g, b, a;
     img.render(ctx, 0, 0);
     imageData = ctx.getImageData(0, 0, width, height);
     data = imageData.data;
@@ -1488,16 +1488,16 @@ var makeRotateImage = function(angle, img) {
     return new RotateImage(angle, img);
 };
 var makeScaleImage = function(xFactor, yFactor, img) {
-	return new ScaleImage(xFactor, yFactor, img);
+    return new ScaleImage(xFactor, yFactor, img);
 };
 var makeCropImage = function(x, y, width, height, img) {
-	return new CropImage(x, y, width, height, img);
+    return new CropImage(x, y, width, height, img);
 };
 var makeFrameImage = function(img) {
-	return new FrameImage(img);
+    return new FrameImage(img);
 };
 var makeFlipImage = function(img, direction) {
-	return new FlipImage(img, direction);
+    return new FlipImage(img, direction);
 };
 var makeTextImage = function(msg, size, color, face, family, style, weight, underline) {
     return new TextImage(msg, size, color, face, family, style, weight, underline);