It's a recurring problem, too. These examples are twenty-two years apart.

"Aircraft software can be serious business" http://www.defenseindustrydaily.com/f22-squadron-shot-down-b...

"The [F22 Raptor IDL] post-incident report" http://it.slashdot.org/comments.pl?sid=224098&cid=181501...

"[undetected software bug in the] Northrop F-20 Tigershark laser inertial navigation system" http://www.f20a.com/f20ins.htm