Sony released the latest PlayStation 4 system update this morning, and apparently it's a rather minor one. Habitual followers of the firmware scene will be au fait with the words "system software stability," which the 1.52 firmware is said to improve.
We'll be looking see if there's any more to it than that, but in the meantime you can check out the update for yourself: You can manually download it via the PS4's Settings menu, or grab it and future updates automatically by enabling Automatic Uploads and Downloads.