diff --git sbr/fmt_scan.c sbr/fmt_scan.c
index c75db3ec..58977359 100644
--- sbr/fmt_scan.c
+++ sbr/fmt_scan.c
@@ -247,6 +247,7 @@ cpstripped (charstring_t dest, size_t max, char *str)
     while (*str != '\0' && len > 0 && max > 0) {
 #ifdef MULTIBYTE_SUPPORT
 	char_len = mbtowc(&wide_char, str, len);
+        fprintf(stderr, "mbtowc(%#x) = %d\n", wide_char, char_len);
 
 	/*
 	 * If mbrtowc() failed, then we have a character that isn't valid
@@ -259,6 +260,7 @@ cpstripped (charstring_t dest, size_t max, char *str)
 	if (char_len < 0) {
 	    altstr = "?";
 	    char_len = mbtowc(&wide_char, altstr, 1);
+            fprintf(stderr, "    mbtowc(%#x) = %d\n", wide_char, char_len);
 	}
 
 	if (char_len <= 0) {
@@ -267,6 +269,8 @@ cpstripped (charstring_t dest, size_t max, char *str)
 
 	len -= char_len;
 
+        fprintf(stderr, "cntrl:%d  space:%d  blank:%d  print:%d\n",
+            iswcntrl(wide_char), iswspace(wide_char), iswblank(wide_char), iswprint(wide_char));
 	if (iswcntrl(wide_char) || iswspace(wide_char)) {
 	    str += char_len;
 #else /* MULTIBYTE_SUPPORT */
@@ -288,6 +292,7 @@ cpstripped (charstring_t dest, size_t max, char *str)
 
 #ifdef MULTIBYTE_SUPPORT
 	w = wcwidth(wide_char);
+        fprintf(stderr, "wcwidth(%#x) = %d\n", wide_char, w);
 	assert(w >= 0);
 	if (max >= (size_t) w) {
 	    charstring_push_back_chars (dest, altstr ? altstr : str, char_len, w);