I've noticed that when there is displacement on an object that has polygons with zero surface area in their uvs, those polygons disappear in the render. I would expect the texture to simple smear over these polygons. I've attached a simple scene demonstrating this with a switch node that nudges the uvs just slightly to "fix" the behavior. This is not an ideal workaround though.
Could be a standalone issue but I don't think I can isolate this without someone testing this on another package.
Standalone 3.00 alpha 4