As we noted earlier, vsftpd has bugs/new behaviour after Ubuntu 11.10. So, do not install ehcp onto Ubuntu versions later than 11.10. Meanwhile, we are working on fixing that.
Sometime, the problem caused by some config lines,
I am reported that the line
in vsftpd.conf is causing some problems. if you have problem with vsftpd, try to remove it and test it.
We will continue solving this issue in following days/weeks.