User picture does not change

When a user deletes his picture and replaces it with a new one, he will see his new picture in the user profile page. However, his new picture is not shown in his authored nodes but rather the old picture is still present. Moreover, this problem exists when he doesn’t delete his old picture but just replaces it with a new uploaded picture. I would like to see his new picture in both his profile page and content pages upon saving his settings. The image cache presets I have are “node image profile” for content pages, and “profile” for profile pages. I’ve tried clearing the caches, running the cron, and even stopping/starting the web server, but with similar results. Could there be a problem with my path?