I had an off-by-one error, for the case of 4n+3 rows in a half-tone picture display. I learned about it when I arrived at the office one afternoon and my boss c

I had an off-by-one error, for the case of 4n+3 rows in a half-tone picture display. I learned about it when I arrived at the office one afternoon and my boss called me into his office, handed me a copy of TIME, and told me to look at page 57. The only reason I didn't get fired was that that release also had a (lossless) compression algorithm that allowed the magazine to push back their photo deadline by a day. (I've always wondered how good my ~50% compression was for pictures, when you only have enough RAM to look at one scan line at a time). Luckily the customers noticed the problem before printing more than a few copies.