modified   gnucash/gnome/gnc-plugin-page-report.cpp
@@ -791,6 +791,7 @@ gnc_plugin_page_report_option_change_cb(gpointer data)
     new_name = g_strdup(gnc_option_db_lookup_string_value(priv->cur_odb,
                                                           "General",
                                                           "Report name"));
+    printf ("here's new_name=[%s]\n", new_name);
     if (strcmp(old_name, new_name) != 0)
     {
         /* Bug 727130, 760711 - remove only the non-printable
@@ -1097,6 +1098,7 @@ gnc_plugin_page_report_name_changed (GncPluginPage *page, const gchar *name)
         /* Is this a redundant call? */
         old_name = gnc_option_db_lookup_string_value(priv->cur_odb, "General",
                                                      "Report name");
+        printf ("here's old_name=[%s]\n", old_name);
         DEBUG("Comparing old name '%s' to new name '%s'",
               old_name ? old_name : "(null)", name);
         if (old_name && (strcmp(old_name, name) == 0))
@@ -1903,6 +1905,7 @@ static gchar *report_create_jobname(GncPluginPageReportPrivate *priv)
         report_name = g_strdup(gnc_option_db_lookup_string_value(priv->cur_odb,
                                                                  "General",
                                                                  "Report name"));
+        printf ("here's report_name=[%s]\n", report_name);
         if (!report_name)
             report_name = g_strdup (_(default_jobname));
         if (g_strcmp0(report_name, _("Printable Invoice")) == 0
modified   libgnucash/engine/gnc-optiondb.cpp
@@ -1261,7 +1261,8 @@ const char*
 gnc_option_db_lookup_string_value(GncOptionDB* odb, const char* section, const char* name)
 {
     auto value{odb->lookup_string_option(section, name)};
-    return value.empty() ? nullptr : strdup(value.c_str());
+    printf ("here's value in optiondb.cpp = [%s]\n", value.c_str());
+    return value.empty() ? nullptr : value.c_str();
 }


RESULT:

- open new transaction report
- open options, change name to "new transaction report title"
- click OK

here's value in optiondb.cpp = [new transaction report title]
here's new_name=[>q��]
* 10:20:34  WARN <gnc.core-utils> Invalid utf8 string: >q��
here's value in optiondb.cpp = [new transaction report title]
here's old_name=[�?q��]
here's value in optiondb.cpp = [>q]
here's new_name=[P6|�V]
* 10:20:34  WARN <gnc.core-utils> Invalid utf8 string: P6|�V
here's value in optiondb.cpp = [>q]
here's old_name=[>q]
here's value in optiondb.cpp = [P6|V]
here's new_name=[P6|�V]
* 10:20:34  WARN <gnc.core-utils> Invalid utf8 string: P6|�V
* 10:20:34  WARN <gnc.engine> [gnc_option_db_destroy()] Direct Destroy called on GncOptionDB 94642090295040