Commented Issue: button of the combobox doesn't work [27221]

Clicking the button of the combobox makes no effect. Dropdown list appears only on KeyPress within the TextBox. TextBox doesn't allow to enter more tрan one symbol, except '-' and '.'
Comments: I like this fix http://forums.asp.net/t/1423235.aspx/1 But it doesn't work properly with the current version. The DropDownList really appears on it's place, but something happens with the button - it stops working.