From IRC

dmitryK|log1: I am in the thmbnail branch still, but it has had master merged in yesterday... But now, whenever I select a layer on a complicated layered piece, it gets an offset, of around half the offset the layer is from the top-left of the document...
This happens each time I select a layer, and occasionally when I switch to the move tool...
I suspect a bug may have crawled in with the modification of the move tool.