I am chinese,my english is very bad,sorry.

JQ 1.6.2 bug ?? :

<script>

function fn1(){

$("#a").attr("disabled","disabled");

}

function fn2(){

$("#a").removeAttr("disabled");

}

</script>

<input type="text" id="a" value="test" / >

<input type="button" value="attr" onClick="fn1()" />

<input type="button" value="removeattr" onClick="fn2()" />