A few years back I discovered that the third-party licensing files we had used in the '90s would roll over in 2016. The format used four ASCII digits for the number of days in an otherwise binary file and the epoch was the founding of the licensing company, sometime in 1988. If they had just used a 32-bit integer instead it would have saved me a lot of headache!
How did you fix the bug? Did you need new licensing files?