I like photobucket for what it is, a place to put pics you want to share on the net. Do not use it to store all your photos. Get a USB stick or memory card for that.
I never download a photo from photobucket. I just don't think it is secure enough. And, like pointed out, they can be buggy at times. But, it is free so you get what you pay for.
In your app, there is an option for uploading automatically. I make sure to turn that off. Otherwise, every time you snap a picture it uploads immediately (if you have a data connection). And, for some reason, it did not work well when I had my iPhone. Uploaded usually ok but viewing from the phone was a so-so kind of thing. Never have had any issues with my Androids, but, like I said, I don't download from there either.