Another pet peeve… clients who submit their content with two spaces after a full stop or period. The first thing I do when I get a document of copy is to perform a find and replace for all double spaces. Im not going to go into the history of why this convention began and why it persists, but for the love of all things natural I wish it would stop.
If you look at any printed magazine, newspaper or book you will see that double spaces do not exist in these publications. So please stop doing it.