Don't forget those people who seem pathalogically inclined to put spaces before periods and not after .I really don't understand how or why they do this but they do .I've seen it a number of times on forums, but only met one person in real life who wrote this way and she'd had a pretty expensive education to boot! She was quite scary though, and a definite bunny boiler, which may be a clue .I agree that two spaces is/was the norm with fixed-width fonts (ie. Courier) but only a single space is required when a proportional font is used .