diff --git a/src/models/challenge.js b/src/models/challenge.js
index 1f17a553e0..6ad5725168 100644
--- a/src/models/challenge.js
+++ b/src/models/challenge.js
@@ -39,6 +39,11 @@ ChallengeSchema.methods.toJSON = function(){
   var doc = this.toObject();
   doc.memberCount = doc.members ? _.size(doc.members) : doc.memberCount; // @see pre('save') comment above
   doc._isMember = this._isMember;
+  _.each(['habits','dailys','todos','rewards'], function(type){
+    _.each(doc[type],function(task){
+      task.id = task._id;
+    })
+  })
   return doc;
 }
 
diff --git a/src/models/task.js b/src/models/task.js
index 97a46cdb94..2832bd2881 100644
--- a/src/models/task.js
+++ b/src/models/task.js
@@ -36,6 +36,9 @@ var TaskSchema = new Schema({
   minimize: 'false'
 });
 
+/**
+ * FIXME why is this function is never called? Instead we're doing a _.each(obj.tasks) in challenges & user
+ */
 TaskSchema.methods.toJSON = function() {
   var doc = this.toObject();
   doc.id = doc._id;
diff --git a/views/shared/tasks/task.jade b/views/shared/tasks/task.jade
index 8601fb837a..afdc38a2ee 100644
--- a/views/shared/tasks/task.jade
+++ b/views/shared/tasks/task.jade
@@ -52,8 +52,8 @@ li(ng-repeat='task in obj[list.type+"s"]', class='task {{taskClasses(task, user.
 
     // Daily & Todos
     span.task-checker.action-yesno(ng-if='task.type=="daily" || task.type=="todo"')
-      input.visuallyhidden.focusable(id='box-{{task.id}}', type='checkbox', ng-model='task.completed', ng-change='changeCheck(task)')
-      label(for='box-{{task.id}}')
+      input.visuallyhidden.focusable(id='box-{{obj._id}}_{{task.id}}', type='checkbox', ng-model='task.completed', ng-change='changeCheck(task)')
+      label(for='box-{{obj._id}}_{{task.id}}')
   // main content
   p.task-text
     | {{task.text}}
@@ -102,11 +102,11 @@ li(ng-repeat='task in obj[list.type+"s"]', class='task {{taskClasses(task, user.
       fieldset.option-group(ng-if='task.type=="habit" && !task.challenge.id')
         legend.option-title Direction/Actions
         span.task-checker.action-plusminus.select-toggle
-          input.visuallyhidden.focusable(id='{{task.id}}-option-plus', type='checkbox', ng-model='task.up')
-          label(for='{{task.id}}-option-plus')
+          input.visuallyhidden.focusable(id='{{obj._id}}_{{task.id}}-option-plus', type='checkbox', ng-model='task.up')
+          label(for='{{obj._id}}_{{task.id}}-option-plus')
         span.task-checker.action-plusminus.select-toggle
-          input.visuallyhidden.focusable(id='{{task.id}}-option-minus', type='checkbox', ng-model='task.down')
-          label(for='{{task.id}}-option-minus')
+          input.visuallyhidden.focusable(id='{{obj._id}}_{{task.id}}-option-minus', type='checkbox', ng-model='task.down')
+          label(for='{{obj._id}}_{{task.id}}-option-minus')
 
       // if Daily, calendar
       // FIXME display, but disable for challenge tasks
@@ -148,7 +148,7 @@ li(ng-repeat='task in obj[list.type+"s"]', class='task {{taskClasses(task, user.
             a.priority-multiplier-help(href='https://trello.com/card/priority-multiplier/50e5d3684fe3a7266b0036d6/17', target='_blank', popover-title='How difficult is this task?', popover-trigger='mouseenter', popover="This multiplies its point value. Use sparingly, rely instead on our organic value-adjustment algorithms. But some tasks are grossly more valuable (Write Thesis vs Floss Teeth). Click for more info.")
               i.icon-question-sign
             | Difficulty
-          .task-controls.tile-group.priority-multiplier(data-id='{{task.id}}')
+          .task-controls.tile-group.priority-multiplier
             button.task-action-btn.tile(type='button', ng-class='{active: task.priority=="!" || !task.priority}', ng-click='task.priority="!"') Easy
             button.task-action-btn.tile(type='button', ng-class='{active: task.priority=="!!"}', ng-click='task.priority="!!"') Medium
             button.task-action-btn.tile(type='button', ng-class='{active: task.priority=="!!!"}', ng-click='task.priority="!!!"') Hard