Is there any explanation for why this seems to happen so sporadically? It will be working completely fine, then I try taking a screenshot an hour later etc. and it's broken. This seems to have been a reported/known issue since release so it's a little annoying to still be happening.
On Win 8.1 with 980s, but this also used to randomly happen on my last Win 7 AMD rig, so it doesn't seem to be OS or gpu related.