Looking around on the wiki, I found this very interesting story about the mission Mariner 1 . It was the 60s and the United States were in full space race and the Mariner 1 was the first probe to Venus was launched July 22, 1962, but as soon as he left the probe curve changes course and NASA was forced to detonate it to avoid damage more.
There was obviously an investigation to clarify what had happened and found the problem:
Was missing a hyphen in a line of code in a program in Fortran for the automatic guidance
The cost of this BUG? Only 80 million dollars.
Arthur C. Clarke has written several years later that the Mariner 1 was "destroyed by the most expensive hyphen in history"
so the next time our boss will be angry for our mistake, tell him that someone with much less did much worse! 
Mariner 1 launch phase.
Posted under Technology
This post was written by admin on November 24, 2008
It is not the only case: I can cite two probes of the program of space exploration of Mars that are precipitated on the planet due to a software error, a test launch of the Ariane 5 rocket carrying satellites for communication and weather that exploded due to a programming error, a U.S. Navy aircraft carriers remained stranded in the Pacific Ocean during a battle simulation due to a programming error ... and there would be many more!