Don't call formatChanged() when disabling XML output as it has side effects.

app/views/export/start.rjs

@@ -129,8 +129,7 @@ page << <<EOJ
     if (bounds.getWidth() * bounds.getHeight() > 0.25) {
       $("format_osm").disabled = true;
       $("format_osm").checked = false;
-
-      formatChanged();
+      $("export_osm").style.display = "none";
     } else {
       $("format_osm").disabled = false;
     }

config/database.yml

@@ -32,5 +32,5 @@ production:
   database: openstreetmap
   username: openstreetmap
   password: openstreetmap
-  host: db.openstreetmap.org
+  host: localhost