I really like Yahoo!Mail in general, but the one thing that bugs me the most about it is that you have to download stored messages one. at. a. time. I've got about 800 stored messages that I'd love to be able to save off to my computer, but based on all the hoops you have to jump through to download one message, I'm looking at about 20 hours to save it all. I don't think it'd take Yahoo 20 man-hours to add multi-download capability for everyone!
If you use Yahoo!Mail, and you feel as strongly about this as I do, go to this particular Yahoo!Mail help page, then click No to get a feedback form. Don't ask them "Why can't I download more than one message at a time?", because they'll just say "Sorry, you can't do that." Ask them "When will you add the feature that lets me download more than one message at a time?"
And if you're still torqued off about it, pass this on to all your Yahoo! friends.
In totally unrelated news: if you think that failing a class because you got caught cheating was bad, then be grateful you don't live here.