Allowing . in $_POST variable

Hi all: I filled a bug today that quickly got resolved invalid, but I think it deserves another look. I had a bit of a problem today with "." getting converted to "_" for my variable names automatically. I have been told that this was because if you have register_globals on, then you can't have a variable with a . in its name. Fair enough. However, since that's now considered to be bad practice, it would make sense to me that this "feature" get another look. I can see no logical reason to not allow . in the global $_POST variable... Basically, what I'd like is to be able to post a form element with id="myvariable.whatever" and access it on the next page with $_POST["myvariable.whatever"]. Comments are appreciated. Mike