> willow: UserWarning: Failed to parse CSS parameter
> Expected type float but got '1' in LineSymbolizer in style
I can't find the string "Expected type float" in the Mapnik source,
neither in 0.6.1 nor in trunk, so i'd guess it comes from some external
lib (some boost parser / lexer lib i'd guess, so it would be good to
look at this a little closer.
Maybe compare the versions with cassini's ones may help? Although
cassini does not run the current osm-stylesheet.