Dropbox has found no evidence of a security breach, an update to its user forum says. The cloud storage company brought in a team of outside investigators to look into a possible security breach. Several users reported receiving the same spam messages, spurring fears that the spammers had obtained their email addresses through Dropbox. Dropbox: “Security is our top priority and we’ll let you know if we uncover evidence that these email addresses came from Dropbox” Users on forum indicated they hadn’t received any further spam on Friday.”]