Comment / #3799

I don't know exactly how your are handling repository security. If you are using the authz_svn_module and you didn't set any special start-commit or pre-commit hook, it will be all right. In fact I just need privileges to create the new folder /trunk and moving everything into it (which is implemented by svn as an atomic copy+delete). I should I already have this privileges, unless you deliberately made it otherwise.
One good thing with the new scheme is that you will be able to give full rights to the tags and branches folders only to trusted people, while keeping the trunk open for read/write to all team members. Cool.