diff --git a/src/cairo-cff-subset.c b/src/cairo-cff-subset.c
index 6f0cd66..aa839b7 100644
--- a/src/cairo-cff-subset.c
+++ b/src/cairo-cff-subset.c
@@ -298,6 +298,10 @@ decode_real (unsigned char *p, double *real)
     char *buf = buffer;
     char *buf_end = buffer + sizeof (buf);
 
+    printf("decode_real ");
+    for (n = 0; n < 10; n++)
+	 printf("%02x", p[n]);
+    printf("\n");
     p++;
     while (buf + 2 < buf_end) {
 	n = *p >> 4;
@@ -312,6 +316,7 @@ decode_real (unsigned char *p, double *real)
     };
     *buf = 0;
 
+    printf("buffer \"%s\"\n", buffer);
     if (sscanf(buffer, "%lf", real) != 1)
         *real = 0.0;
 
@@ -1129,17 +1134,26 @@ cairo_cff_font_read_font_metrics (cairo_cff_font_t *font, cairo_hash_table_t  *t
     p = cff_dict_get_operands (font->top_dict, FONTMATRIX_OP, &size);
     if (p) {
         end = p + size;
-        if (p < end)
+        if (p < end) {
             p = decode_number (p, &xx);
-        if (p < end)
+	    printf("xx = %f\n", xx);
+	}
+        if (p < end) {
             p = decode_number (p, &yx);
-        if (p < end)
+	    printf("yx = %f\n", yx);
+	}
+        if (p < end) {
             p = decode_number (p, &xy);
-        if (p < end)
+	    printf("xy = %f\n", xy);
+	}
+        if (p < end) {
             p = decode_number (p, &yy);
+	    printf("yy = %f\n", yy);
+	}
     }
     /* Freetype uses 1/yy to get units per EM */
     font->units_per_em = _cairo_round(1.0/yy);
+    printf("units per em %d\n", font->units_per_em);
 }
 
 static cairo_int_status_t
@@ -2559,6 +2573,7 @@ cairo_cff_font_generate (cairo_cff_font_t  *font,
                  font->scaled_font_subset->subset_id);
     }
 
+    printf("Font: %s\n", font->ps_name);
     status = cairo_cff_font_subset_font (font);
     if (unlikely (status))
         return status;