Hi!
I've always thought that matching tag values is case insensitive. But today I found a situation where
colour='#00ff00'
rule doesn't match when tag value is '#00FF00'.
creating a rule (colour='#00ff00' | colour='#00FF00') solved my problem.
Is it a bug in mkgmap or this kind of matching should by design be case sensitive? Maybe the hash sign causes trouble somewhere.