diff --git a/floatimg.h b/floatimg.h
index 5083630..5ee3a33 100644
--- a/floatimg.h
+++ b/floatimg.h
@@ -2,7 +2,7 @@
  *	floatimg.h
  */
 
-#define		FIMG_VERSION	91
+#define		FIMG_VERSION	92
 
 /*
  *	in memory descriptor
diff --git a/lib/fimg-compare.c b/lib/fimg-compare.c
index dbe1755..e89e234 100644
--- a/lib/fimg-compare.c
+++ b/lib/fimg-compare.c
@@ -15,7 +15,7 @@ extern int verbosity;		/* must be declared around main() */
 /* ---------------------------------------------------------------- */
 int fimg_images_compatible(FloatImg *a, FloatImg *b)
 {
-#if DEBUG_LEVEL
+#if DEBUG_LEVEL > 1
 fprintf(stderr, ">>> %s ( %p %p )\n", __func__, a, b);
 #endif
 
diff --git a/lib/interpolate.c b/lib/interpolate.c
index c1a36b6..737c48b 100644
--- a/lib/interpolate.c
+++ b/lib/interpolate.c
@@ -41,23 +41,28 @@ int fimg_interpolate(FloatImg *s1, FloatImg *s2, FloatImg *d, float coef)
 {
 int		foo;
 
+#if DEBUG_LEVEL
+fprintf(stderr, ">>> %s ( %p %p %p %f )\n", __func__,
+				s1, s2, d, coef);
+#endif
+
 foo = fimg_images_compatible(s1, s2);
 if (foo) {
-	fprintf(stderr, "compat -> %d\n", foo);
+	fprintf(stderr, "compat s1 s2 -> %d\n", foo);
 	return foo;
 	}
 
 foo = fimg_images_compatible(s1, d);
 if (foo) {
-	fprintf(stderr, "compat -> %d\n", foo);
+	fprintf(stderr, "compat s1 d  -> %d\n", foo);
 	return foo;
 	}
 
 switch (s1->type) {
 	case FIMG_TYPE_GRAY:
-		gray_interpolate(s1, s2, d, coef);	break;
+		gray_interpolate (s1, s2, d, coef);	break;
 	case FIMG_TYPE_RGB:
-		rgb_interpolate(s1, s2, d, coef);	break;
+		rgb_interpolate  (s1, s2, d, coef);	break;
 	default:
 		fprintf(stderr, "%s, %d is a bad type\n", __func__, s1->type);
 		return -18;
diff --git a/tools/fimgops.c b/tools/fimgops.c
index e536342..02f17bf 100644
--- a/tools/fimgops.c
+++ b/tools/fimgops.c
@@ -95,6 +95,7 @@ switch (action)	{
 	case OP_MAXI:
 		foo = fimg_minimum(A, B, D);		break;
 	default:
+		fprintf(stderr, "fscking action #%d\n", action);
 		foo = -99;				break;
 
 	}