https://defuse.ca/audits/encfs.htm is an EncFS security audit, that didn't come out too clean. If you install encfs on debian it pops up a warning screen telling you to not use it for anything too sensitive atm.
Yeah, I'm aware of some of those security issues (I understand that it can't help me if I am targeted. But, I may be safe in broad hack attempts). However, I just don't have any solution that has the convenience & stability of Dropbox + encfs. What do you use for syncing docs securely?