I think a lot of this is expected no? The mobile market is maturing, and they are making less profitable versions of their products.
Its interesting to see how investors react to Microsoft and Apple who are both hugely profitable, and then some start ups(ahem, twitter, pinterest, snapchat) with no proven business model get huge valuations. I know that investors are trying to predict the market, but the second a hugely profitable company seems unfashionable(for lack of a better word) any slight variation in performance is panned in the press and the stock gets sold off.