Photobucket installed a fix yesterday that might require you to update your Adobe Flash. Whenever I have Photobucket issues I make sure both my Flash and my Java are up to date.
I use Firefox and all is well with the updated Flash installed. (didn't need a Java fix this time)
Google Adobe Flash update and you will find an appropriate link on the Adobe site. There will be a button (somewhere) that you press to tell you what version you have and then you can download new from the download section. Generally you have to have your browser closed during the download and installation phases.