[html-formfu] Disabled form field with retain_default and render_processed_value

[Kiki]

Hello all,

I have a form with a field filled in with a timestamp (via DateTime 
inflator) from a DB.
The default stringification of the DateTime object is kinda ugly 
(2008-04-18T17:10:06)
so I have set up a strftime deflator for the field to format it properly.

This field is disabled therefore when the user submits the form, the 
field value is not sent to the server.
After submission I re-display the form, but since the field was not sent 
the field is empty.
I have set "retain_default" for the field and upon submission the field 
is displayed with the proper value from the DB.

The problem is that the second time (after submission) the deflation 
phase is skipped thus the ugly DateTime stringified
value is displayed. Setting "render_processed_value" has no effect 
(probably because the field does not appear in the request sent to the 
server).

Is there another way to accomplish displaying a formatted value fetched 
from the database or am I overlooking something?

Kiki