Failing Roundabout Detection at Theodor Heuss Platz

[MoKob]

At Theodor Heuss Platz, all roads seem to be correctly tagged for junction=roundabout.

We fail to provide roundabout-instructions, though, making a trip around the place very verbose. Compare this route.

[FrakGart]

Should be tagged junction=circular as there are traffic lights.

See: http://www.openstreetmap.org/user/daniel-j-h/diary/40101