I have a similiar strange behaviour:



Clicking on (1) or (2), character follows yellow line, but blue should be followed.

I've tried lot of MaxClimb values [0...100] without result.

This is recast related, please check this post:
http://code.google.com/p/recastnavigatio...&start=100
http://digestingduck.blogspot.com/2010/1...tions.html

I've solved my problem. My scene and physical mesh were in the middle of 2 world areas. At image, where the 3 lines intersect, is exactly the division of the 2 world areas.

I moved the whole scene to the middle of a world area and now, path is build in different way and characters walk normally.