I've never had a problem with changing my header in past, but this week I've been trying to change the current image and its not working, no matter what method I use. It doesn't work if I choose an uploaded image directly from my computer or media library, even if I use one of the default images. Whichever image I choose, it lets me select it and then shows up in the Header Image preview section under Appearances, but once I click on the actual live site, the image hasn't actually changed and my current image remains. Has anyone else had this happen? Any suggestions on what might be causing this and/or how to fix?