Last week, two executive vice presidents--Jeff Weiner of the network group, and Usama Fayyad of research and computing infrastructure--said they'd be leaving. A third EVP, Qi Lu, in charge of search and monetization, joined the list this week. Two senior vice presidents also are departing, Brad Garlinghouse of communication and communities, and Vish Makhijani of search.

said by TKJunkMail :

I read elsewhere they have lost over 50 top execs in the last year.