The issue in this file is related to a change in RailClone 3 which fixes some illogical behaviour present in previous versions. In RailClone 3, Transform->Fixed Size is computed before applying the other transformations (such as Rotate or Scale). This is an improvement because it means you can rotate a segment, for example by 45 degrees, and then resize it using Fixed Size with no problems. In RailClone 2 this would cause the segment to skew, which is seldom desirable.
Unfortunately your style has been designed to get around this earlier limitation and now doesn't work correctly in RC 3. The fix is easy, just swap the X and Y fixed size values for the rotated part so that the sizes for each axis are set before the segment is rotated. We're looking into the best way to support your older styles without causing confusion for users who could then experience two different ways of fixed size being calculated.
Thanks for understanding,