validating an "edit" form

[eluser]jleequeen[/eluser]
@xwero

I've implemented your helper solution and it works like a charm. Thanks for that nifty solution. I just have one more issue that I can't seem to figure out with regards to validating across multiple fields. For example, I have 3 fields of which you only need to fill out one of them. So I can't use a required rule on each one of them individually. But I also can't use a call back function, because If you come into the form the first time and each field is left blank, there is nothing in one of the fields to trip the callback function. Is there a way around this?