I utterly and completely loathe the newer version of Yahoo Mail and you really need to stop changing my format away from basic.
The basic mail is fine. What I need is for you to STOP switching me to the new version. I hate it, it attempts to allow endless ad servers to add themselves to whitelists. Unfortunately for you I use firefox because I know how to set up the configuration to block whitelist downloads...and I know how to use my hosts files to block specific webpages in a way that will have their computers pinging themselves instead of me, if I don't just choose to decide to bounce them instead.