Yahoo is definitely experiencing some pain. Three days ago, my favorite part of my.yahoo -- the news feeds of items related to your portfolio -- just disappeared, leaving a big open void in the middle of my page. No word on where it went, why, or when it might return.
Then earlier this evening I found their image search api has changed in a way not compatible with their published SDK's, so if you were using them on your site, your site was broken. Again no words of warning. I just had to dig through their code and patch it.
Now I just read about more internal staff moves within Yahoo. They are clearly focusing on sales, which is good. I just wish they wouldn't take their eyes off of their tech.