If you are posting a new comment, you will be redirected to the coppermine index page, because the & is not translated to &
See URL after post:
www.somedomain.com/modules.php?name=coppermine&file=displayimage&pos=-40403
(seems to be in db_input.php redirection)
I guess you're refering to "Coppermine for CMS". This board is dedicated to the standalone (non-nuked) version of coppermine, so your posting simply doesn't apply.
Read http://forum.coppermine-gallery.net/index.php?topic=2277.0
GauGau
P.S. moved your posting to the old nuke support board for reference