mapnik-german osm style, problem with views in postgres database

Hi, I am trying to get the german mapnik style to work on Ubuntu 12.04 as proposed by the SVN README:

> To deploy this style use the supplied default.style file for
> osm2pgsql and import data using the hstore extension of
> PostgreSQL (--hstore --hstore-match-only switches of osm2pgsql).
>
> To keep the database compatible to the "original" Mapnik style we
> now use views instead of tables. SQL scripts to set up these views
> are supplied in the views directory.

I create my database using sachsen.osm from geofabrik and osm2pgsql from the ppa:kakrueger/openstreetmap (osm2pgsql SVN version 0.81.0 (64bit id space))

osm2pgsql -m -d osm --hstore -W -S /path/to/mapnik-german/views/default.style  mapnik/sachsen.osm

Then I create the views that are supposed to be used by the germany mapnik style:

sudo -u postgres psql osm < mapnik-german/views/view-line.sql
sudo -u postgres psql osm < mapnik-german/views/view-point.sql
sudo -u postgres psql osm < mapnik-german/views/view-polygon.sql
sudo -u postgres psql osm < mapnik-german/views/view-roads.sql

Then I create a new directory "mapnik-de" containing the mapnik-repo. I copy mapnik-german ontop of that (is that the way to go?) and copy all the template files to inc files in mapnik-de/inc-de/. I use mapnik-de as working directory.

Now, when I try to generate my xml file

./generate_xml.py --dbname osm --host 'localhost' --user USERNAME --port 5432 --password 'PASSWORD' --inc inc-de  osm-de.xml > osm-local.xml

I get the following error:

/usr/lib/pymodules/python2.7/mapnik2/__init__.py:27: DeprecationWarning:  mapnik2 module has been deprecated,
        please use 'import mapnik' 
  warnings.warn(msg, DeprecationWarning)
Traceback (most recent call last):
  File "./generate_xml.py", line 204, in <module>
    serialize(template_xml,options)
  File "./generate_xml.py", line 80, in serialize
    mapnik.load_map(m,xml,True)
RuntimeError: Postgis Plugin: PSQL error:
ERROR:  column "wood" does not exist
LINE 1: ...enity,landuse,leisure,man_made,military,"natural",wood,power...
                                                             ^
Full sql was: 'SELECT * FROM (select way,aeroway,amenity,landuse,leisure,man_made,military,"natural",wood,power,tourism,coalesce("name:de",name) as name,highway,
       case when religion in ('christian','jewish') then religion else 'INT-generic'::text end as religion
       from planet_osm_polygon
       where landuse is not null
          or leisure is not null
          or aeroway in ('apron','aerodrome')
          or amenity in ('parking','university','college','school','hospital','kindergarten','grave_yard','prison')
          or military in ('barracks','danger_area')
          or "natural" in ('field','beach','desert','heath','mud','grassland','wood','sand','scrub')
          or power in ('station','sub_station','generator')
          or tourism in ('attraction','camp_site','caravan_site','picnic_site','zoo')
          or highway in ('services','rest_area')
       order by z_order,way_area desc
      ) as leisure LIMIT 0'
  encountered during parsing of layer 'landcover' in Layer at line 381 of 'osm-de.xml'

I am using mapnik 2.1.0 from the ppa:mapnik/v2.1.0

To me it looks like the generated views are not correctly accessed. When I use a custom default.style file with osm2pgsql that contains "wood" and a couple more, then this error does not show and I can create tiles.

I am not used to postgresql or postgis. Maybe I just understood something wrong? I took a look with pgadmin3 and there are the four views and except view_osmde_roads they all contain the column "wood".