Possible BUG in bzr push

[Jorges]

hi all,
My ISP gives me some space to host my personal web page. I can upload by 
using ftp. Yesterday I thought of using it to hold some of my personal 
branches. What I did:

cd ~/my-branch
bzr push ftp://username@ftp.address.for.uploading/

I get asked for the password:

FTP username at ftp.address.for.uploading password:

And after typing it I get the following message:

bzr: ERROR: File exists: '/': 550 /: File exists

Note that the root of my personal web space is mapped to the root of the 
ftp server. Am I doing something wrong?
I am using bzr-0.10, bzrtools-0.10, paramiko-1.6.1, Crypto 2.0.1

jorges