--- NoMethodError from thread: periodic poll
undefined method `+' for nil:NilClass
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/maildir.rb:171:in `end_offset'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/source.rb:88:in `done?'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:610:in `send'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:610:in `__pass'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:597:in `method_missing'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:107:in `do_poll'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:104:in `each'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:104:in `do_poll'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:103:in `synchronize'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:103:in `do_poll'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:570:in `send'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:570:in `method_missing'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/modes/poll-mode.rb:15:in `poll'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:50:in `poll_with_sources'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:69:in `poll'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:87:in `start'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup.rb:76:in `reporting_thread'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup.rb:74:in `initialize'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup.rb:74:in `new'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup.rb:74:in `reporting_thread'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/poll.rb:84:in `start'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:570:in `send'
/var/lib/gems/1.8/gems/sup-0.11/lib/sup/util.rb:570:in `method_missing'
/var/lib/gems/1.8/gems/sup-0.11/bin/sup:241
/var/lib/gems/1.8/bin/sup:19:in `load'
/var/lib/gems/1.8/bin/sup:19