Sony's latest portable has been gifted its second firmware update, version 1.51 has been released and it is reported to fix issues with "game progress" with some titles, It has also been reported that the firmware update is small in size and takes less than one minute to download. The update can be downloaded directly from PSVita's System Update, or can be obtained using a PC or a PS3.
Source : http://www.psvitavlog.com/ps-vita-1-51-firmware-update-now-released/
Source : http://www.psvitavlog.com/ps-vita-1-51-firmware-update-now-released/