Simple UV unwrap with unexpected results - 2.78 Pretty simple UV unwrap, not anything I'd consider complex but for the life of me I cannot understand the results. I have prepared a file with just the object in the state of unwrap - hopefully someone can figure out what I could have done? Not sure this is related to 2.78 but that is what I am using.

All doubles have been removed - just by the way, and scale was applied.
You have your vertices of the Uv Island pinned. Select the island with A in Uv Editor and press Alt+P or go to Uvs-->Unpin to unpin it. Then unwrap it (U-->Unwrap) and it's gona look fine.