Okay, I tried the loging out thing, wait, and then log back in, and that didn't work. And....I've had this creepy shadow person for a week now! I've tried to change pictures. Nothing is working!!!
Okay, take a deep breath. I'm here to help, honest. =)
As the other posters have noted, it can take awhile for a picture to update -- anywhere from 30 minutes to an hour -- but one week is indicative of another issue.
Because it's very difficult for me to tell what the problem is without specifics, I'm going to try a bit of a scattershot approach first:
1. What is the format of the file you are using? It should be a JPG or GIF for optimum results.
2. How large is the file you are uploading, in pixels?
3. Are you using a Mac or PC?
4. What browser are you using?
If you can give me the answers to those questions, I may be able to diagnose your problem better. Thanks!