Hello, I think the dependency of libapache2-mod-passenger on librack-ruby should be set to the version from backports (e.g. >=1.0.0). Otherwise libruby-rack from lenny is installed and rewindable_input.rb cannot be found. Another suggested change is to allow apache2-mpm-prefork as well as apache2- mpm-worker (I got it up and running with prefork since yesturday). Regards, Sebastian