diff --git a/funcs/displacement.c b/funcs/displacement.c
index e7f7a9f..2749aa9 100644
--- a/funcs/displacement.c
+++ b/funcs/displacement.c
@@ -22,7 +22,6 @@ float		minmax[6];
 float		rgb[3];
 float		dltr, dltg, dltb;	/* delta des minmax */
 float		dispx, dispy;
-
 int		dstx, dsty;
 int		in, out;
 
@@ -83,9 +82,7 @@ for (y=0; y<psrc->height; y++) {
 			fimg_put_rgb(pdst, dstx, dsty, rgb);
 			in++;
 			}
-
 		}
-
 	}
 
 if (verbosity) fprintf(stderr, "%s -> in %d out %d\n", __func__, in, out);
diff --git a/funcs/fimg-png.c b/funcs/fimg-png.c
index 815b0d3..74f6081 100644
--- a/funcs/fimg-png.c
+++ b/funcs/fimg-png.c
@@ -171,7 +171,7 @@ unsigned char		*bytes, *bptr;
 double			maximum, fk;
 
 #if DEBUG_LEVEL
-fprintf(stderr, ">>> %-25s ( %p '%s' 0x%x )\n", __func__, src, outname, flags);
+fprintf(stderr, ">>> %s ( %p '%s' 0x%x )\n", __func__, src, outname, flags);
 #endif
 
 if (flags) {
diff --git a/funcs/geometry.c b/funcs/geometry.c
index 7921aca..b31f467 100644
--- a/funcs/geometry.c
+++ b/funcs/geometry.c
@@ -123,7 +123,6 @@ fprintf(stderr, ">>> %s ( %p %p %p )\n", __func__, in, out, rect);
 if (verbosity > 1) {
 	fimg_describe(in,  "extractor: source");
 	fimg_describe(out, "extractor: destination");
-	// print_rectangle(rect);
 	}
 
 /*
diff --git a/funcs/incrustator.c b/funcs/incrustator.c
index 2ab2c83..b921836 100644
--- a/funcs/incrustator.c
+++ b/funcs/incrustator.c
@@ -47,6 +47,9 @@ return -1;
 }
 */
 /* ---------------------------------------------------------------- */
+/*
+ *	See also:    fimg_extractor() in geometry.c
+ */
 int fimg_incrustator_0(FloatImg *psrc, FloatImg *pdst,
 				int xpos, int ypos, int flags)
 {
diff --git a/funcs/recurse.c b/funcs/recurse.c
index e2d080d..ec23db2 100644
--- a/funcs/recurse.c
+++ b/funcs/recurse.c
@@ -22,6 +22,12 @@ int fimg_recursion_proto(FloatImg *src, FloatImg *dst, int notused)
 fprintf(stderr, ">>> %s ( %p %p %d )\n", __func__, src, dst, notused);
 #endif
 
+if (notused) {
+	fprintf(stderr, "%s parameter notused is %d, must be 0\n", 
+			__func__, notused);
+	return -2;
+	}
+
 fprintf(stderr, "!!!!!! %s is a wip !!!!!\n", __func__);
 
 /*