Redmine

Hello.
i have 2 redmine servers

first, old, is
Redmine 1.2.1.stable
we call it 'sugar'

second, new is
Environment:
Redmine version 2.3.0.stable
Ruby version 1.9.3 (x86_64-linux)
Rails version 3.2.13
Environment production
Database adapter Mysql2
Redmine plugins:
no plugin installed
we call second redmine 'crm'. test redmine.

our boss uses iphone app - RedmineApp for Iphone.

in sugar boss works well, but cant see any attachments.

in crm boss cant add,edit issue because problem
Due Date (Начата) is not valid date.

here log
Started PUT "/redmine/issues/84.json?key=ad84ddea7f06c7422c5dbd0dcfaa0ae60e18caa3&include=attachments%2Cchildren%2Crelations" for 46.227.184.122 at 2013-05-16 11:42:40 +0600
Processing by IssuesController#update as JSON
Parameters: {"issue"=>{"start_date"=>"2013/05/16", "due_date"=>"2013/05/17", "assigned_to_id"=>"10", "notes"=>"Необходимо полностью данные", "estimated_hours"=>"4"}, "key"=>"ad84ddea7f06c7422c5dbd0dcfaa0ae60e18caa3", "include"=>"attachments,children,relations", "id"=>"84"}
WARNING: Can't verify CSRF token authenticity
Current user: saken.matov (id=24)
Rendered common/error_messages.api.rsb (0.6ms)
Completed 422 Unprocessable Entity in 181ms (Views: 1.9ms | ActiveRecord: 7.0ms)

but if we use safari on iphone it works correct.

Processing by IssuesController#update_form as JS
Parameters: {"utf8"=>"✓", "authenticity_token"=>"xSnVZdQeKwbL6LUzDP6XQbzXgD4Jv8d6LTGbh0qMsw8=", "issue"=>{"is_private"=>"0", "tracker_id"=>"2", "subject"=>"Тоо Brisk Deal- по адресу Сауранбаева 4.", "description"=>"не работает интернет.\r\nЗвонил Артем: 8 707 249 50 25\r\nЗаявка в ДКП, номер: 271624", "status_id"=>"1", "priority_id"=>"2", "assigned_to_id"=>"", "parent_issue_id"=>"", "start_date"=>"2013-05-17", "due_date"=>"", "estimated_hours"=>"", "done_ratio"=>"0"},

main problem is "start_date"=>"2013/05/16", "due_date"=>"2013/05/17" - date format is wrong. in safari "start_date"=>"2013-05-17" is correct.

if i can change redmine to understand that "2013/05/17" is same to "2013-05-17".