I just wish Yahoo's acquisition spree doesn't end badly with employees leaving, because the IP really doesn't seem to be worth anything (in the case of Summly, Qwiki, etc).
Right now it is just short term pump and dump. There is 0 strategy. It will only end up with employees getting fired due to Yahoo executives mistakes.
So it isn't an executive mistake per se but rather misaligned executive and shareholder incentives.