v2.1.0 broke UV layers

Title says it all.  I have a pre-2.1 file, which now in 2.1 reading of 
UV layers is broken.

Here's the file in question:
http://www.datafilehost.com/d/1ab13bf3

The layer in question is RenderLayer.UV.  It shows up as black and 
sometimes also as random lines like memory trashing.  In reality it 
should show a mostly blue figure.
The file can be seen with mrViewer or with NUKE8, which I also tried and 
shows the same problem.