Which fill-up are you trying to edit? And what are you wanting to change it to?
What browser are you using?
Any of them. All I'm doing is trying to change the date field to a different date... I've tried Safari on OS X 10.9.4, and Chrome on same. It saves, and the page reloads, and the date is correct, but then when I look at the log, it's back to the old date.