When an armature is animated one bone after another and reaches a certain complexity with numerous rotations on the bones, the conversion of the action into strip gives incoherents results (see the file herewith), even though in the classic action mode everything works perfectly. It seems that the quaternions are badly converted in the strip. I have done many tests : Armature symmetrically made. Armature made in one and only piece. Armature realised from facing views, profil or top views. Using the CTRL+N on all the bones in edition mode. Using the CTRL+A on the whole armature. Adjusted to flat the W quaternion in the Ipo's, before the conversion into strip. Adjusted to flat the Z quaternion in the Ipo's, before the conversion into strip. Whatever I do, the conversion into strip gives an incoherent result on the rotations and I have to use a second armature that controls the first one with IKA's solvers ans constraints to obtain a nearly correct result, that's really annoying. I've also tested the whole process above, in all the Blender version since the NLA creation, but the bug appears in all the versions. Thanks to see if this bug can be corrected.