Hmm, the version you downloaded is the one with patch v2 applied,
--adjust-turn-headings and --x-cycle-map ( but  without --x-fix-sharp-angles!). I actually don't even have that one installed.

I don't see the error on an older version (even older than the one you downloaded - that means it had --adjust-turn-headings no new option, and no patch applied). Map data/mkgmap split is however identical.
With the newest version with correct options given and v2 patch (--adjust-turn-headings not given, but with --x-fix-sharp-angles and with --x-cyclemap and of course patch v2) it only happens in Driving Profile with Shorter Distance (and all avoidances deselected). With faster time the bug does not appear.

I just copied the newest version with the bug to openmtbmap.org/mtbaustria.exe
if you want to try it out (timestamp is 2015-09-03)
You're version was the one where I could not see much improvements but actually saw some things changed to before....

On 03.09.2015 15:47, Gerd Petermann wrote:

Hi Felix,

I am a bit confused now. I just downloaded and installed mtbaustria.exe (files in it where
created 2015-09-02)
and I see the error at node 2509650557 (detour and u-turn at node 255940422)

What do you call the "old map" ?

Gerd