I have a following error in ubuntu 10.10. $ cat /tmp/dropbox_errorn52V1x.txt Traceback (most recent call last): File "__main__dropbox__.py", line 667, in main_startup File "__main__dropbox__.py", line 389, in run AssertionError: Wrong build of Dropbox (9 vs 14 needed) Thanks solution from Claus M. at dropbox forum . It also works for me. $ dropbox stop $ dropbox status # Should report "not running" $ rm -r ~/.dropbox-dist/ $ dropbox start -i