Redmine › Extended Fields

I have added an Integer Custom Field for Issues with a simple Custom Field Template:

[da@home extended_fields$]$ cat app/views/custom_values/int/_testinteger.html.erb
Test: <%= custom_field.value.to_s %>

It works great to show it:

TestInteger:    Test: 2

But when I try to change it, I’m greeted with:

404
The page you were trying to access doesn't exist or has been removed.

And this is generated in the logs:

Started PUT "/redmine/issues/1" for ::1 at Mon Oct 15 15:56:23 +0200 2012
Processing by IssuesController#update as HTML
  Parameters: {"last_journal_id"=>"1", "attachments"=>{"1"=>{"description"=>""}}, "time_entry"=>{"comments"=>"", "activity_id"=>"", "hours"=>""}, "notes"=>"", "commit"=>"Submit", "authenticity_token"=>"ox+MjDtCs+lxJubqmS2khv2v7mMYmCEXGy/HaVapVX8=", "utf8"=>"✓", "issue"=>{"subject"=>"Bug1", "description"=>"", "priority_id"=>"2", "status_id"=>"1", "custom_field_values"=>{"1"=>"33"}, "due_date"=>"", "estimated_hours"=>"", "tracker_id"=>"1", "assigned_to_id"=>"", "parent_issue_id"=>"", "is_private"=>"0", "start_date"=>"2012-10-15 00:00:00", "lock_version"=>"1", "done_ratio"=>"0"}, "id"=>"1"}
  Current user: user (id=1)
  Rendered mailer/_issue.text.erb (7.4ms)
  Rendered mailer/issue_edit.text.erb within layouts/mailer (11.3ms)
Missing template, responding with 404
  Rendered common/error.html.erb within layouts/base (0.1ms)
Completed 404 Not Found in 291ms (Views: 16.6ms | ActiveRecord: 19.3ms)

If I remove the custom field template (_testinteger.html.erb) everything works again.

I am using these versions:

Environment:
  Redmine version                          2.1.2.stable
  Ruby version                             1.8.7 (i686-darwin9.2.1)
  Rails version                            3.2.8
  Environment                              production
  Database adapter                         MySQL
Redmine plugins:
  extended_fields                          0.2.0b

So what am I doing wrong? Why can’t I change the values for the custom fields when I have added custom field templates?

/apan