Rails - Jul 2006 - radio_button with boolean fields does not work with postgresql

I don''t know what I am doing wrong. I have a User class with a
"send_message_emails" boolean field. The value for this is true. In
postgresql this is stored as a "t" in the database. In Rails this
field is a
boolean and is set to true, but for some reason the following code is *not*
working... the radio_button is not selected.

<%= radio_button "user", "send_message_emails",
''true'' %>

I have tried all of the following combinations and none of them have worked:
<%= radio_button "user", "send_message_emails",
''true'' %>
<%= radio_button "user", "send_message_emails",
''True'' %>
<%= radio_button "user", "send_message_emails", true
%>
<%= radio_button "user", "send_message_emails",
''1'' %>
<%= radio_button "user", "send_message_emails", 1 %>
<%= radio_button "user", "send_message_emails",
''t'' %>

The radio button is never selected. I''ve printed out @
user.send_message_emails right before the radio_button and the value is
definitely boolean true.

Has anyone else seen this problem? Any ideas?
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