This used to work in jQuery 1.3.2, but it's broken on 1.4.0:

$.ajax({

type: "GET",

url: "/json/",

data: {left: "abc", length: 3},

dataType: "json",

cache: true,

success: function() {...}

})

jQuery 1.3.2 calls the following URL:

/json/?left=abc&length=3

jQuery 1.4.0 calls the following URL:

/json/?0=undefined&1=undefined&2=undefined

The number of undefined parameters is equal to the value of length in data.