I think it's really humorous that people feel safe putting an encrypted file in something like Dropbox, but don't trust LastPass (who are doing the exact same thing, everything is local, client side encryption). Especially when you're missing out on all of the benefits of browser integration.
Please, take a whole 3 minutes and do a tiny bit of research. Your future self will thank you when people like swombat and myself get to laugh at LinkedIn, change our passwords and never think about it again.