diff --git a/Fonderie/glitches.c b/Fonderie/glitches.c
index 393c453..3df039f 100644
--- a/Fonderie/glitches.c
+++ b/Fonderie/glitches.c
@@ -100,7 +100,7 @@ int random_blocks(FloatImg *picture, int percent)
 {
 int		x, y;
 
-if ( (picture->width%16) || (picture->height%8) )
+if ( (picture->width%16) || (picture->height%16) )
 	{
 	fprintf(stderr, "%s: %d%d bad dims\n", __func__,
 				picture->width, picture->height);
@@ -173,9 +173,7 @@ h = picz->height;		w = picz->width;
 for (y=BB; y<h-BB; y++) {
 
 	dy = (float)y * omega;		/* normalize vertical position */
-
 	x = xpos + x_delta(dy, phi);	/* add sinus deviation */
-
 	/* compute bounding box */
 	if ( (x>BB) && (x<w-BB) ) {
 		/* an make the glitch */
@@ -184,7 +182,6 @@ for (y=BB; y<h-BB; y++) {
 		if (rand() & 8)
 			fimg_plot_rgb(picz, x-1, y, fv, fv, fv);
 		if (rand() & 8)
-		// XXX else
 			fimg_plot_rgb(picz, x+1, y, fv, fv, fv);
 		}
 	}