Steps to reproduce:

1. Type "abc" in the first text input element
2. Hit tab or click elsewhere on the page to trigger the change event - you should see an alert
3. Click the button to set the value of the first text element to ""
4. Type "abc" in the first text input element again
5. Hit tab or click elsewhere on the page to trigger the change event again

Expected:

The alert appears for a second time.

Actual:

The alert does not appear.

Notes:

This only occurs in Internet Explorer 6-8 using jQuery 1.4.0. Previous versions of jQuery do not exhibit this behavior.