I'm not sure how to get it to do a thumbnail from photobucket. I always just load my pictures to HG from my hard drive. Are you clicking on the image from your photobucket album to make it bigger before copying it? Or just copying it directly from the album, where it shows the smaller pictures? Like this one is how it would be just clicked from the album listing:
And this is if I actually click on it from the album first and make it bigger in photobucket first (hope that makes sense)
I love 1/8 korkers too.