Taking Animations from 2012 back to 2011

AutoTangent type:

  This is something we discovered last week, to be honest I should have figured it before but as a lot of the data passing between 2012 and 2011 at the studio is baked MoCap nobody spotted this issue. 

The problem is the new 'AutoTangent' type in Maya 2012. So lets say you start animating in 2012 but need to pass that data back to somebody running 2011. We already know Maya binaries between the two are incompatible, so you save and an Ascii file and that works. The issue is that by default in Maya2012 the tangent type is set in the prefs as the new 'AutoTangent'. Now this is great and to be honest a big improvement over the standard spline tangents. BUT.... Maya 2011 doesn't know anything about it. The key data still loads up, but the tangent types of each keyframe in2011 remain unset which means any interpolation between keys you did in 2012 is now screwed! 

 If you intend to do this, go from 2012 back to 2011 DO NOT use AutoTangent when keying.