heroku rake db:drop error PG::Error: FATAL: permission denied for database "postgres"

Googe found this as the second hit
http://stackoverflow.com/questions/8162420/running-rake-dbdrop-dbcreate-dbmigrate-on-heroku-cedar-stack

I don't know what pg:reset does on heroku so this may not be relevant
but generally it is better to use rake:schema:load rather than create
followed by running all the migrations.

Colin