deletion problem with 1.8+example

I tried to delete http://play.dwagn.org/play/aname and when I got the warning about dependents, clicked "Yes do it", and got:

 

 

TypeError in CardController#remove

can't modify frozen hash

Rails.root: /usr/cldstr/wagn.org/wagn/ws/web

Application Trace | Framework Trace | Full Trace
app/models/card.rb:230:in `destroy_without_validation'
app/models/card.rb:226:in `destroy_without_validation'
app/models/card.rb:256:in `destroy_without_permissions'
lib/wagn/model/permissions.rb:31:in `destroy'
app/controllers/card_controller.rb:128:in `remove'

Request

Parameters:

{"format"=>"html",
 "commit"=>"Yes do it",
 "authenticity_token"=>"YbGElTJuSjjU71xi91cseZvAuUPpj+Vi0GNssU2XqZA=",
 "utf8"=>"342234223",
 "id"=>"aname",
 "success"=>"REDIRECT: TO-PREVIOUS",
 "confirm_destroy"=>"true",
 "home_view"=>"open",
 "main"=>"aname"}

 

Show session dump

Show env dump

Response

Headers:

None