I've been testing BuddyPress 1.5 (which will release soon) and having this plugin activated breaks nearly all interactivity. Content shows but you can't post, reply, comment, favorite, anything.
Given the other issues with this plugin, I'd advise users to jump ship to a different slider plugin. I'd advise the developer remake the plugin as well if they wish to keep it alive. Nothing personal, it just doesn't behave well.
http://wordpress.org/extend/plugins/nivo-slider-for-wordpress/
