The repo scene has the animation to scroll the 2 layers of texture's tiling and offset values on material, with constant speed (linear curve).

Step:
1. Open Repo scene
2. Play the scene, you should see the blue sphere is accelerating

Expected result:
All the UVs should scroll with constant speed. The red layer is slower and blue layer is faster, but both with constant speed.

Actual result:
The red layer is scrolling with constant speed, blue layer is scrolling with increasing speed (accelerating).

Note:
Removing Library and ProjectSettings folder does fix this problem.
So creating new project will not have this problem.
The repo project is uploaded with all the library and project settings folder.

Regression is checked by opening the repo project with the following versions:
Reproduced in: 2017.1.0b4, 2017.1.0b3, 2017.1.0b2
Not reproduced in: 2017.1.0b1, 5.6.0p4