Dropbox Bug Wipes Some Users' Files From The Cloud
 

I'm not sure a year of free service would be enough to make up for deleting all my files. Cautious types will frequently tell you not to rely on cloud storage as your only backup, and a handful of internet denizens have just learned this the hard way. Dropbox has confirmed that a bug in some older versions of its desktop apps deleted the files of some people who turned on Selective Sync, which limits cloud syncing to certain folders.

http://www.hardocp.com/news/2014/10/...es_from_cloud/