Problem with second shadow

Please help me, I don't know why, but my phpAlbum makes second shadow in opened pictures. It means this: http://foto.milanfox.cz/main.php?cmd=imageview&var1=Portraits%2Fadela%2FIMG_1477-Edit.jpg In thumbnails it is ok, but opened pisture does this and not properly, because of some problem with missing image of corner. Thanks