Index: bp-templates/bp-legacy/js/buddypress.js
===================================================================
--- bp-templates/bp-legacy/js/buddypress.js	(revision 8284)
+++ bp-templates/bp-legacy/js/buddypress.js	(working copy)
@@ -378,6 +378,10 @@
 
 		/* Load more updates at the end of the page */
 		if ( target.parent().hasClass('load-more') ) {
+			if ( bp_ajax_request ) {
+				bp_ajax_request.abort();
+			}
+
 			jq("#buddypress li.load-more").addClass('loading');
 
 			if ( null == jq.cookie('bp-activity-oldestpage') )
@@ -393,7 +397,7 @@
 				just_posted.push( jq(this).attr('id').replace( 'activity-','' ) );
 			});
 
-			jq.post( ajaxurl, {
+			bp_ajax_request = jq.post( ajaxurl, {
 				action: 'activity_get_older_updates',
 				'cookie': bp_get_cookies(),
 				'page': oldest_page,