The Singapore Airlines website has now been updated to reflect the changes:
Also opened for the following VA flights:
VA 4149, departing 1210 hours
VA 4173, departing 1425 hours
VA 4134, departing 1205 hours
VA 4138, departing 1935 hours
VA 1909, departing 1030 hours
VA 1911, departing 1300...