[AccessD] Setting form filter string

Hello All:

I discovered today that I couldn't assign the empty string to a form filter
in Access 2003:

Me.Filter = ""

left the filter string unchanged.  I couldn't assign a Null to it, either.
Has anyone else run into this?  Help doesn't say anything.  The workaround
is to set Me.FilterOn to False instead, but it still seems weird.

Doug Steele