lookup widget - selecting "none"

Hi,
Wondering if there is a bug, but when using the Lookup widget, once you have selected something, you cant go back to a NULL or empty field unless you use the "update field" button and check "blank"
Any ideas?
Wondering if there is a bug, but when using the Lookup widget, once you have selected something, you cant go back to a NULL or empty field unless you use the "update field" button and check "blank"
Any ideas?