Hi Felix,
Overlays. I mean the overlays file in the style-files. Before 1139 if you had a line in your lines file saysing for example: highway=footway & highway=cycleway [0x123 resolution 20] you could now define in the overlays file 0x123: 0x2a, 0x0c and both 0x2a and 0x0c were included in the map at the same place. So if your footway looks like 0x0x0x (with 0 being transparent in typfile, and x being a color) and cycleway y0y0y0 (with y being another color), the result would be both footway and cycleway rendered as yxyxyx.
routes... ups sorry should have said relations. Anything written to the relations file is not enacted anymore.
Thanks for spelling this out for me. I'm such an airhead that I didn't even know these features existed! I have looked at the overlay stuff and still can't see why the extended type code should break it so, at the moment, it remains a mystery. I shall keep thinking about it. Cheers, Mark