I don't normally use Yahoo data, but out of boredom I tried to download free Yahoo data with AmiQuote and it didn't work for me. I can't say for certain that's it's gone for good or just a fluke.
But I can say that Yahoo Finance has gone to complete **** these days. I don't know if it's Mayer's fault or what, or maybe there's a corporate war going on that all us plebs are unaware of. But whatever the reason that site in general has been virtually unusable for me in the past half year or so. Load times are horrendous, the site locks up and crashes my browser and other odd things.