olelo runtime error after trying to use signup to create user

olelo_runtime_rake_error.txt

$  unicorn
/home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/backports/uri/common_192.rb:53: warning: already initialized constant WFKV_
I, [2011-10-17T16:40:16.857135 #17526]  INFO -- : listening on addr=0.0.0.0:8080 fd=3
I, [2011-10-17T16:40:16.857347 #17526]  INFO -- : worker=0 spawning...
I, [2011-10-17T16:40:16.857936 #17526]  INFO -- : master process ready
I, [2011-10-17T16:40:16.858391 #17528]  INFO -- : worker=0 spawned pid=17528
I, [2011-10-17T16:40:16.858524 #17528]  INFO -- : Refreshing Gem list
DEPRECATION WARNING: Yajl's JSON gem compatibility API is going to be removed in 2.0
I, [2011-10-17T16:40:18.989178 #17528]  INFO -- : worker=0 ready
RuntimeError: cannot parse Cookie header: can't add a new key into hash during iteration
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/request.rb:248:in `rescue in cookies'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/request.rb:233:in `cookies'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/cookie.rb:102:in `unpacked_cookie_data'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/cookie.rb:96:in `extract_session_id'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:43:in `load_session_id!'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:32:in `[]'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:252:in `current_session_id'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:258:in `session_exists?'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:104:in `exists?'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:114:in `load_for_read!'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:98:in `inspect'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:65:in `inspect'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:65:in `check_env'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:42:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:195:in `context'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/session/abstract/id.rb:190:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/Development/olelo-wiki-test/lib/rack/static_cache.rb:81:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/deflater.rb:13:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/showexceptions.rb:24:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/runtime.rb:17:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:48:in `_call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/lint.rb:36:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/showexceptions.rb:24:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/commonlogger.rb:20:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/chunked.rb:41:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/rack-1.3.4/lib/rack/content_length.rb:14:in `call'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:528:in `process_client'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:600:in `worker_loop'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:485:in `spawn_missing_workers'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/unicorn-4.1.1/lib/unicorn/http_server.rb:135:in `start'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/gems/unicorn-4.1.1/bin/unicorn:121:in `<top (required)>'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/bin/unicorn:19:in `load'
        /home/john/.rvm/gems/ruby-1.9.2-p290@olelo-wiki-test/bin/unicorn:19:in `<main>'
192.168.255.100 - - [17/Oct/2011 16:40:25] "GET / HTTP/1.1" 500 118966 0.0912