Index: activity.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/activity/activity.module,v
retrieving revision 1.1.2.2.2.30.2.32
diff -b -u -p -r1.1.2.2.2.30.2.32 activity.module
--- activity.module	10 Mar 2009 18:44:26 -0000	1.1.2.2.2.30.2.32
+++ activity.module	13 Mar 2009 06:45:11 -0000
@@ -550,12 +550,14 @@ function activity_get_activity($uids = A
     $params[] = $uids;
   }
   else {
+    if (!empty($uids)) {
     foreach ($uids as $uid) {
       $nums[] = "%d";
       $params[] = $uid;
     }
     $wheres[] = 'activity_targets.target_uid IN ('. implode(',', $nums) .')';
   }
+  }
 
   // Build sql limiting query to on filtered fields
   if (!empty($filters) && is_array($filters)) {