Check your Monthly Bandwidth usage in the Account Usage panel on your My home: Latest activity page. If you’ve exceeded your limit, the usage bar is red, and the logo replaces your images and videos.
Note: When you upgrade to Pro, or when your monthly anniversary date arrives, the bandwidth resets to zero, and your images redisplay.
If you did not exceed the monthly bandwidth allowance, or you are not a Photobucket member, you probably have an image or video incorporated in your MySpace background (or other website) that is hosted in a Photobucket member's album which has exceeded the bandwidth allowance. Remove the code that was linked from Photobucket to prevent the logo from displaying.
You can avoid exceeding bandwidth when you get a Pro account, which has un-metered bandwidth. However, Photobucket reserves the right to disable direct linking on accounts that use excessive bandwidth or otherwise abuse the system.
If you are not a Photobucket member, consider joining Photobucket and using your own account to host the images you want to display around the web.