It seems to not be able to load on heroku with latest hubot and twitter adapter. What more do you need to fix?
State changed from crashed to starting
2012-09-27T00:16:15+00:00 heroku[web.1]: Starting process with command bin/hubot -a twitter -n my_twitter
2012-09-27T00:16:16+00:00 app[web.1]: bin/hubot: 3: npm: not found
2012-09-27T00:16:19+00:00 app[web.1]: [Thu Sep 27 2012 00:16:19 GMT+0000 (UTC)] ERROR Cannot load adapter twitter - TypeError: Object #<Object> has no method 'robot'
2012-09-27T00:16:19+00:00 app[web.1]: TypeError: Object #<Object> has no method 'robot'
2012-09-27T00:16:19+00:00 app[web.1]: at Object. (/app/node_modules/hubot-twitter/src/twitter.coffee:7:28)
2012-09-27T00:16:19+00:00 app[web.1]: at Object. (/app/node_modules/hubot-twitter/src/twitter.coffee:169:4)
2012-09-27T00:16:19+00:00 app[web.1]: at Module._compile (module.js:446:26)
2012-09-27T00:16:19+00:00 app[web.1]: at Object..coffee (/app/node_modules/hubot/node_modules/coffee-script/lib/coffee-script/coffee-script.js:22:21)
2012-09-27T00:16:19+00:00 app[web.1]: at Module.load (module.js:353:31)
2012-09-27T00:16:19+00:00 app[web.1]: at Function._load (module.js:311:12)
2012-09-27T00:16:19+00:00 app[web.1]: at Module.require (module.js:359:17)
2012-09-27T00:16:19+00:00 app[web.1]: at require (module.js:375:17)
2012-09-27T00:16:19+00:00 app[web.1]: at Robot.loadAdapter (/app/node_modules/hubot/src/robot.coffee:215:31)
2012-09-27T00:16:19+00:00 app[web.1]: at new Robot (/app/node_modules/hubot/src/robot.coffee:47:14)
2012-09-27T00:16:19+00:00 app[web.1]: TypeError: Cannot call method 'on' of null
2012-09-27T00:16:19+00:00 app[web.1]: at Object. (/app/node_modules/hubot/bin/hubot:105:19)
2012-09-27T00:16:19+00:00 app[web.1]: at Object. (/app/node_modules/hubot/bin/hubot:109:4)
2012-09-27T00:16:19+00:00 app[web.1]: at Module._compile (module.js:446:26)
2012-09-27T00:16:19+00:00 app[web.1]: at Object.run (/app/node_modules/hubot/node_modules/coffee-script/lib/coffee-script/coffee-script.js:79:25)
2012-09-27T00:16:19+00:00 app[web.1]: at /app/node_modules/hubot/node_modules/coffee-script/lib/coffee-script/command.js:175:29
2012-09-27T00:16:19+00:00 app[web.1]: at /app/node_modules/hubot/node_modules/coffee-script/lib/coffee-script/command.js:150:18
2012-09-27T00:16:19+00:00 app[web.1]: at [object Object]. (fs.js:123:5)
2012-09-27T00:16:19+00:00 app[web.1]: at [object Object].emit (events.js:64:17)
2012-09-27T00:16:19+00:00 app[web.1]: at Object.oncomplete (fs.js:1190:12)
2012-09-27T00:16:20+00:00 heroku[web.1]: Process exited with status 1
2012-09-27T00:16:20+00:00 heroku[web.1]: State changed from starting to crashed
This should fix it:
https://github.com/MathildeLemee/hubot-twitter/pull/10
It seems that npm isn't installing the latest version. Try to download this repo manually and replace the old files with the ones you downloaded.
See #13