Like every other 3rd party IM app, Miranda was unable to connect with Yahoo once they made their switch-over to the new server (scs.msg.yahoo.com) and authentication mechanism about a week ago. Trillian, GAIM, Easy Message and others all managed to fix their code but the Miranda commuinity is pretty loose-knit and the Yahoo protocol isn’t “owned” by anyone in the core team so it took a little while for someone to grab the latest libyahoo2 and incorporate it into the Yahoo plug-in. Anyway, I’ve downloaded it (pointer to the download location is in this Yahoo plug-in thread in the Miranda forum.