I could never write about one day’s worth of errors on Yahoo!. There are just too many and I’d just get a migraine. So, here’s just one grammatical goof from yahoo.com:
Yahoo! advertises millions of dollars’ worth of products every day; too bad one of those products isn’t a grammar book. The editors could use a little lesson on using the apostrophe to form quasi-possessives like one day’s pay and four years’ experience.