Fix Dropbox Indexing

It turns out that Dropbox has a hidden feature to fix such things. Open the Dropbox preferences, click on Account, then press the Option key. The Unlink This Computer button will change to Fix Permissions. Click that button and let Dropbox go through your files.
Merlin Mann

Speaking of Dropbox, they just updated their App to an iOS7 styled design with sharing improvements (AirDrop!), speed improvements and a whole lotta white.