--- old-grapevine/libgrapevine-gtk/gossip-account-widget-generic.c      2007-04-22 15:43:06.000000000 +0200
+++ new-grapevine/libgrapevine-gtk/gossip-account-widget-generic.c      2007-04-22 15:43:06.000000000 +0200
@@ -68,8 +68,13 @@
 
        str = gtk_entry_get_text (GTK_ENTRY (widget));
        param_name = g_object_get_data (G_OBJECT (widget), "param_name");
-
-       mc_account_set_param_string (settings->account, param_name, str);
+        
+        if (strcmp(str, "") == 0) {
+                mc_account_unset_param (settings->account, param_name);
+
+        } else {
+               mc_account_set_param_string (settings->account, param_name, str);
+        }
 
        return FALSE;
 }