Felix,
3. delete 1/3 of the lines in my polygons style-file or delete this last
section:
leisure=* & fixme!=yes & import!=* [0x2a
resolution 24]
tourism=* & fixme!=yes & import!=* [0x2b
resolution 24]
sport=* & fixme!=yes & import!=* &sport!=skiing &sport!=ski [0x2c
resolution 24]
landuse=* & landuse!=commercial & fixme!=yes & import!=* [0x2d
resolution 24]
natural=* & fixme!=yes & import!=* [0x2e
resolution 24]
amenity=* & fixme!=yes & import!=* [0x2f
resolution 24]
Looking at 63650004.img, it uses 66 line types and 67 area types.
What happens if you reduce both/either of those numbers of types to
less than 64?
I don't think this will help, I have found tiles (i.e. Vienna where
more 77 different polygons and 74 line tpyes are used in one tile) and
those tiles work perfectly fine. Should I even give it a try?