**System Information**
Windows 8.1 x64 with GTX 580
**Blender Version**
Broken: 2.71 Date: 2014-06-25 18:36 Hash: 9337574
Worked: 2.70a Date: 2014-04-10 11:49 Hash: f93bc76
**Short description of error**
User Preferences -> Editing -> New F-Curve Defaults -> Interpolation has no effect on animation.
Either set from script or user interface, the interpolation is not taken into account (for instance, if set to LINEAR, the animation still plays as BEZIER). Only the GRAPH EDITOR -> key -> Interpolation Mode has an effect. How to change that in python?
**Exact steps for others to reproduce the error**
Just change the interpolation mode in User preferences to LINEAR for example.
Any animation is still played as BEZIER.