Dude....I have tried to get that seam but I cant...I did a glass with thickness and one without and still couldnt get it to do it?? The only thing I can think of though, it didnt appear in your second one...is there are some unmerged verts? or duplicate faces or something thats weird...I will keep trying mate
cheers bullet
bullet1968
"A Darkness at Sethanon", a book I aspire to model some of the charcters and scenes