The PS3 got the Y2K bug ten years later. On Monday, March 1, a calendar-related glitch struck older PS3 consoles. The internal clock of the console incorrectly considered 2010 as a leap year, preventing users from joining the PlayStation Network and playing certain games that used trophies. However, Blu-ray playback wasn't affected. The glitch has sorted itself out without the need for a system update.

Source: http://www.blu-ray.com