Many were outraged when Darrell Whitelaw tweeted a picture of Dropbox denying his ability to share a folder due to a DMCA (Digital Millennium Copyright Act) takedown request. Whitelaw later admitted that he was indeed trying to share a copyrighted video with a public link. Dropbox has explained to Ars Technica that it does not scan private documents, nor did it remove the file from Whitelaw’s account, but it does compare hashes of publicly shared files against the hashes of files that have already been served a notice. The DMCA requires companies like Dropbox to take measures to ensure that copyrighted material is not shared after a takedown notice has been issued. Whitelaw himself told Ars, “They’re just following the laws laid out for them. Was just surprised to see it.” follow link
Move the Dock Quickly
You may find it convenient to move the position of the Dock when working in certain programs or with certain files. Rather than choosing a different position from the Dock preferences pane or using a submenu in the Apple menu's Dock submenu, you can move your Dock to a different screen edge merely by Shift-dragging the separator that divides the application and document sections.
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Dropbox Explains Policy on DMCA Reviews