If you were out on vacation last week, you may have missed what was probably the most important news for email marketers and email newsletter publishers: The fact that Yahoo is altering the actual words in your subject lines and emails on occasion to avoid security problems. Some pretty ordinary words are changed; stuff you might never expect. I highly recommend you check out the best round-up article on this problem that I've seen, from Janet Roberts at Ezine-Tips. It includes stories from marketers describing how this Yahoo problem is affecting their mailings already.