js error 2

event.returnValue is deprecated. Please use the standard event.preventDefault() instead. jquery.js:3259
Exception from Deps recompute: TypeError: Cannot read property 'yh' of undefined
    at Object.Template.fooRow.userBasedThing (http://localhost:7000/client/allProducts.js?3fc0bab6b6c33d12091761fb6c9ad938f98a9f37:49:29)
    at apply (http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:276:24)
    at invoke (http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:301:12)
    at http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:365:30
    at Object.Spark.labelBranch (http://localhost:7000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:1171:14)
    at branch (http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:355:20)
    at http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:364:18
    at Array.forEach (native)
    at Function._.each._.forEach (http://localhost:7000/packages/underscore.js?a1286cdb983623d4d035c8d7cd7a1e8e15274cf5:130:11)
    at template (http://localhost:7000/packages/handlebars.js?c2b75d49875b4cfcc7544447aad117fd81fccf3b:358:7) debug.js:41
Exception from Deps recompute: TypeError: Cannot call method 'firstNode' of undefined
    at Object.Spark.renderToRange (http://localhost:7000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:603:25)
    at null._func (http://localhost:7000/packages/spark.js?3a050592ceb34d6c585c70f1df11e353610be0ab:925:13)
    at _.extend._compute (http://localhost:7000/packages/deps.js?5ac28feec1f3e0539889ecde598dd9d01e408b41:163:12)
    at _.extend._recompute (http://localhost:7000/packages/deps.js?5ac28feec1f3e0539889ecde598dd9d01e408b41:176:14)
    at _.extend.flush (http://localhost:7000/packages/deps.js?5ac28feec1f3e0539889ecde598dd9d01e408b41:258:14) debug.js:41