So I noticed something odd today. I have a selectbox in a Flash Form that has a top level option doing this:

<option value=""<cfif form.donationForm is"">selected</cfif>>All</option>

However, when I submit the form, the value is "", not an empty string. Here is a more full featured example that shows it:

<cfdump var="#form#">

<cfform format="flash">
   <cfselect name="foo">
      <option value="">Blank</option>
      <option value="1">One</option>
<cfinput type="submit" name="f1" value="submit">

If you change the format to HTML, it works as expected.