It’s always there for me (in my browser and sometimes in my RSS app). I had seen a post a while back about refreshing in the browser to get rid of it but that never worked. I tried clicking on the image to load the actual page it’s on and guess what? Didn’t work. So I kind of gave up. After being berated about trying things that don’t work yesterday I poked around some more and found something that does work: I have to right-click on the image and choose “View Image”, which opens the image (and only the image) in its own window and bam! no watermark.