Year-field displays as one year early than the one selected in the date field

Steps to reproduce :
Localization setting is set on an European setting (Paris)

Create a date format with "Y" only : the result is "2011"
Then create a "year" date type using this date format "2011"

Create a date field with a select list widget.
Pick "year" as default display
Default value blank or now doesn't matter you get the same behavior.
Input format I tried "18/02/2011 21:52:34" and a custom "Y"
Years back and forward I use -6:+1 but I get the same with the default value.
Custom date parts within and above : same result.
Granularity "year"

Create a content with the date field
Select a date in the select list (eg. 2010), save and you'll see the selected year-1 as a result (one year earlier than the selected one) (eg. 2009).

Maybe related 6.x issue :
http://drupal.org/node/605824