I have this issues with noscript when using Google's autofill from the toolbar Version 5.0.20090813W. The autofill boxes stay behind after you press the button. They stay there until you restart firefox.
I have tried the Dev version (v 1.9.9.10) and am still experiencing the same issue. Because of this issue I need to keep Noscript disabled until a fix is in place, Help!
abourque

Mozilla/5.0 (Windows; U; Windows NT 6.0; en-US; rv:1.9.1.3) Gecko/20090824 Firefox/3.5.3 GTB5