The 405 also happens when trying to open a file on a remote http server (such as launchpad's librarian) - bzr will try to open that file with .bzr/branch-format appended to it.
The 405 also happens when trying to open a file on a remote http server (such as launchpad's librarian) - bzr will try to open that file with .bzr/branch-format appended to it.