Border box unchecked but can't get rid of it

Hi,

thank you for reading me.
I read all Settings Page and I don’t have any border box checked but images still have a thin border that I can’t get rid of.
You can see there : http://www.lilianginet.com/?page_id=692&wppa-album=3&wppa-photo=56&wppa-occur=1

Where is my mistake ?
Thank you in advance,

And by any chance, if you can fix the very big space under images (I tried your advice of buttons with visible arrows, It didn’t work properly and, waiting for the update, I put back the originals bbbr.png and bbbl.png but the space is still there)…

Pistolero7

http://wordpress.org/plugins/wp-photo-album-plus/