I just updated a site from 3.6.(can't remember the last digit). After I updated, my header image in the images/header folder was gone. I was able to upload the image again, and get it to display in the Header area after some adjusting with the image height field. Are there any other types of changes that are affected when you update the theme?
What I do see is that when I visit the site from the Dashboard, is the Views button in the toolbar at the top of the page isn't displaying. Also the button next to the WP logo has blue text (same as when you open the dropdown list) and only displays and white text on a black background when you hover over it (sort of like the whole thing is reversed). This is also true of the Edit Page button.
How can I fix this?