Check out the URL I provided:
http://www-10.lotus.com/ldd/nd6forum.nsf/55c38d716d632d9b8525689b005ba1c0/b5b3995034ffa46285256e0400688f56?OpenDocument
I would say don't use the parameter. IF you can replicate without the parameter then we all know what the issue is. {Also I just did a search on the parameter name and got these results -- I would recommend to search this forum for the excellent knowledge it has first.)
HTH -- Cheers