OK so it's not supposed to link to a larger version? When I hover over the small picture in your first post I get the "finger and fist" indicating a link. With my own Photobucket links that takes me and anyone else to a larger version. But with Image Shack it takes me to an ad page to sign me up. I guess that's where the difference is.
Anyhow, try loosening slightly and give 'er a good thump upside'a da saddle and see if that smartens 'er up. .......Gol durn persnickety seat post clamps.......