Marko,
Thanks, we will see about that tomorrow. Actually, I did the first run on a couple of days old snapshot. With this morning's snapshot, I still get the error. The clone-off point should be around 10pm (can't remember if it was German or Finnish time), and the map should be available for download on Geofabrik's server in the morning.
I can't remember exactly but I think it was changed somewhere around 7-8AM this morning.
The warnings are great. JOSM's Validator plugin is not catching the confluence of oneways, and it can't possibly catch the roundabout direction. You see, I am already using that new word. mkgmap is serving an educational purpose as well. :-)
Great, now I need to find another 15 century word to describe the opposite situation where multiple oneway roads start at the same point. At the moment it just says: "Source of oneway roads" but that's boring, don't you think? Incidentally, if you specify --report-dead-ends=2 you will get a large number of warnings (certainly, the GB data has a lot). Some of those will be genuine problems that could be fixed so if you really are feeling bored and want something to do you could sift through those (for your region, of course). Cheers, Mark