accepts_nested_attributes_for and _destroy not working (but no error messages)

I have a has_many association and does some adding throug a nested form, i can add objects (images) and edit text this works fine. But when i try to delete items nothing happens. This is what my log looks like:

Started POST "/photosets/168" for 127.0.0.1 at Fri Apr 15 07:34:04 +0200 2011 Processing by PhotosetsController#update as HTML Parameters: {"commit"=>"Ändra Photoset", "authenticity_token"=>"18nwmbNhushmQoXOLafzzjodbCoCtQMu22MG772Y8Xg=", "utf8"=>"✓", "photoset"=>{"title"=>"en ny titel", "photosetassets_attributes"=>{"6"=>{"_destroy"=>"false"}, "7"=>{"_destroy"=>"false"}, "8"=>{"_destroy"=>"false"}, "9"=>{"_destroy"=>"false"}, "0"=>{"id"=>"971", "_destroy"=>"false"}, "1"=>{"id"=>"972", "_destroy"=>"false"}, "2"=>{"id"=>"975", "_destroy"=>"false"}, "3"=>{"id"=>"976", "_destroy"=>"1"}, "4"=>{"_destroy"=>"false"}, "5"=>{"_destroy"=>"false"}}, "credit_tokens"=>"1", "description"=>"dsadsad", "genre_ids"=>["1", "2", "3"]}, "id"=>"168"}

And it looks to me as "3"=>{"id"=>"976", "_destroy"=>"1"} is marked for _destroy here.

If i in the console write: p = Photoset.last f.update_attributes("photosetassets_attributes" => {"id" => "976", "_destroy" => "1"}) p = Photoset.last.photosetassets

=> [#<Photosetasset id: 971, image: "20090818-img_0024.jpg", photoset_id: 168, created_at: "2011-04-15 05:02:26", updated_at: "2011-04-15 05:02:26">, #<Photosetasset id: 972, image: "arvidsson0161.jpg", photoset_id: 168, created_at: "2011-04-15 05:02:26", updated_at: "2011-04-15 05:02:26">, #<Photosetasset id: 975, image: "2009_01_04_img_00000323.jpg", photoset_id: 168, created_at: "2011-04-15 05:23:38", updated_at: "2011-04-15 05:23:38">]

And its deleted.

Please advice me what to do, have been working on this for the last nights and i cant see whats wrong with it.

/Niklas

Couple things you can try -

1. Where you have _destroy="false" replace that with _destroy="0" - just in case something is throwing that parser out of whack 2. Try _delete instead of _destroy - been a while but I remember in one of my setups _delete worked but not _destroy

-S