Dropbox Fails To Start With "VerificationError: importing pylinux..."

Open a terminal using Ctrl+Alt+T keyboard shortcuts and run the following commands:

sudo rm -rf /var/lib/dropbox/.dropbox-dist
rm -rf ~/.dropbox-dist
dropbox start -i

This will remove the downloaded Dropbox binaries and re-download them. Once the download is finished, Dropbox should start normally again.

Be careful when dealing with rm -rf.