>"Dropbox did not buy Mailbox based on a couple of Techcrunch posts, and they obviously will have done their due diligence before purchasing the company."

I like Dropbox. But recent history is filled with terrible acquisitions that have you wondering what the lawyers and accountants were doing:

Ebay buying Skype.

Microsoft buying Danger.

Microsoft buying aQuantive.

Anyone investing in Color.

AOL buying Time Warner.

Yahoo! buying Geocities.

and these were all huge deals I can think of off the top of my head. The number of small ones is, I'm sure, substantially larger.