jquery 1.7.2 version ok 1.11.3 happen error.

jquery 1.7.2 version ok 1.11.3 happen error.

1.7.2
$(this)
[<input type=​"checkbox" class=​"pc" name=​"needCompare_1447745538243" id=​"needCompare_1447745538243" value=​"1" style=​"display:​ none;​" checked=​"checked">​]
$(this).get(0).checked
true
$(this).is(':checked')
true
$(this).attr("checked")
"checked"
this.checked
true
$(this).prop("checked")
true
ok

1.11.3
$(this)
[<input type=​"checkbox" class=​"pc" name=​"needCompare_1447751632524" id=​"needCompare_1447751632524" value=​"1" checked=​"checked" style=​"display:​ none;​">​]
$(this).get(0).checked
false
$(this).is(':checked')
false
$(this).attr("checked")
"checked"
this.checked
false
$(this).prop("checked")
false
error
why?