[OSM-dev] Mapnik-Glitch "Schwarzwald"

[Roland Olbricht]

Hello,

Although the rendering stack in general works excellent, there is a 
strange glitch near Stuttgart in Germany:

http://yevaud.openstreetmap.org/11/1076/704.png
contains the string "Schwarzwald" (which doesn't belong there)
but there is no element with a tag of any key with value "Schwarzwald" 
anywhere near, c.f.
http://overpass-turbo.eu/s/64L

The phenomenon has sustained a re-rendering, with rendering times from
Sat Nov 15 19:03:44 2014
and
Sun Nov 16 01:45:21 2014

Can somebody please explain where this "Schwarzwald" comes from? Or give 
a hint where to look next to understand the glitch?

Best regards,

Roland