While leaks are always great for the media and often good for shareholders who otherwise might be kept in the dark about serious issues within a company, they also can be destructive to a corporation, especially if they're coming from a highly placed insider.
Further, you have to question the motives of a company employee who is leaking damaging memos right before an earnings release. Is this an attempt to manipulate share price by an employee who's shorting the stock? It's not an unreasonable question.
I certainly wouldn't be surprised if Apotheker already has his IT staff reviewing every email from the 10 or so senior executives who reportedly were recipients of his memos. Don't be surprised if you soon hear that one or more of Apotheker's lieutenants are "pursuing other opportunities."