It looks like a problem with Procedural Wings and not Retro Future. Try the .dll in this post ( http://forum.kerbalspaceprogram.com/threads/29862-0-25-Procedural-Dynamics-Procedural-Wing-0-9-1?p=1492738&viewfull=1#post1492738 ). I tested Retrofuture with Procedural Wings in a clean setup, and that seemed to fix it.