Screenshot capture Bug?

v497_vesper

I have just put up picture frames in my base and took screenshots but when it came to putting them in I couldn't see any Screenshots at all, just the "press f11 to take a screenshot" message, and I am using the most recent update, post "Dangerous creatures release update" I also noticed another issue with something that looks like a rocky formation that looks like it is from a completely different biome floating above the water with no attachement to anything in the safe shallows and ALSO underneath the water intertwining with a part of the Safe Shallows terrain