IE8 reports: 'null' is null or not an object (caused by indexing null as an array)

[gravious]

IE8 reports: 'null' is null or not an object

On line 1919 of jquery-1.4.2.js:

var events = jQuery.data(this, "events"), handlers = events[ event.type ];

Line 2681 of jquery-1.3.2.js fixes the problem:

handlers = ( jQuery.data(this, "events")

{} )[event.type];

Or:

var events = jQuery.data(this, "events"); if (events!=null) var handlers = events[ event.type ];

[dmethvin]

Please reopen with a test case demonstrating how this problem occurs.

[gravious]

The problem turned out to be an old version of Interface elements for jQuery. I've switched to the development version of jQuery UI.