BuddyPress.org

@626design the best way to pinpoint the problem is remove all customisations you’ve made. Start with a theme such as Twenty Thirteen with no plugins activated. Then activate your plugins one by one. Then introduce your custom functions one by one. Test each time you make a change. It is a long winded process but when customising your site that is the only way to fix the problem. There’s no easier way I’ve come across.