I have noticed that since build 1330 or 1334 that a couple things on Forms are different.
The first, is that now when you tab through fields (both text and number), the form refreshes. I double checked to make sure that the "Save Form when selection changes" options are off on the fields. This happens for both the add and edit events for all full page/tab forms.
The second, is that when click besides a field, not in it or on it, but basically anywhere the cell (that is defined in the form designer), the cell is highlighted. This is a Chrome/Safari/FF issue. It does not happen in IE
