search for: remove_record

...Here''s the last couple of lines from the trace, in case it''s helpful: activerecord (3.0.0) lib/active_record/associations/ association_proxy.rb:260:in `raise_on_type_mismatch'' activerecord (3.0.0) lib/active_record/associations/ association_collection.rb:522:in `block in remove_records'' activerecord (3.0.0) lib/active_record/associations/ association_collection.rb:522:in `each'' activerecord (3.0.0) lib/active_record/associations/ association_collection.rb:522:in `remove_records'' activerecord (3.0.0) lib/active_record/associations/ association_collectio...