OS X 10.10.4, AMD 5770
Broken: 2.75 official (and 2.75.2 15c301f)
Short description of error
Using the bevel modifier's limit feature causes some edges to "pop out of place" and move slightly, messing up shading.
Exact steps for others to reproduce the error
See attached bevel_warp.blend file. Play with the limit settings on the bevel modifier, notice how "angle" limit mode causes the mesh to distort. If you view the model from top-ortho and toggle the modifier visibility on and off, you can clearly see it's not a shading artifact and the modifier is actually moving edges when it shouldn't be.