The lawsuit above is at least the third False Claims Act lawsuit filed against Lockheed Martin by Houston-based lawyer Samuel Boyd. The previous two involve the Deepwater and F-22 programs. Lockheed, for its part, says it will "vigorously defend this matter in court".
Read the news article about the lawsuit on Flightglobal.com.
As far as I know, this is the first accusation in public about the quality of the F-35's software, which has actually been praised by top program officials as an area of high achievement.