I have missing streets in Bratislava (Slovakia) in index. But I am not sure whether is is only in Bratislava (which uses districts). I tried to compile only partial map (cut off from Slovakian map) containing only corresponding part of Bratislava and streets are there. My address setup in style file is like this:

# Slovakia
mkgmap:country=SVK & mkgmap:city!=* & mkgmap:admin_level6=* { set mkgmap:city='${mkgmap:admin_level6}' }
mkgmap:country=SVK & mkgmap:city!=* & mkgmap:admin_level9=* { set mkgmap:city='${mkgmap:admin_level9}' }
mkgmap:country=SVK & mkgmap:city!=* & mkgmap:admin_level8=* { set mkgmap:city='${mkgmap:admin_level8}' }