Please drop that. I missed the following two lines:

[Errno 20] Not a directory: '/tmp/selenium-ide-editor-1.10.0.xpi/install.rdf'
Missing files: /tmp/tmpJ8MPdL.mozmill-tests/tests/addons/ide@seleniumhq.org/restartTests/manifest.ini

The latter should be an issue with our mozmill-tests repository.