There is a bug when using Chrome or IE (Firefox works as expected) in version 3.0.0.7
To reproduce the error do the following.
1. Enter a value in an edit box and then do an ajax post on the page from a button.
2. Manually clear the box and then do another ajax post on the page from a button. The edit box looks like it is cleared, but the data that was originally in the edit box is not cleared.
3. If you turn on the tiwcgjqedit.clearbutton and use that to clear the edit box then Chrome, Firefox, and IE work as expected.