Potential Bug with gform_disable_post_creation

I'm using the gform_disable_post_creation action as the documentation specifies, but the post is being created anyway. My code:

add_filter("gform_disable_post_creation", "disable_post_creation", 10, 3);
function disable_post_creation($is_disabled, $form, $entry){
    return true;
}

Not sure why it's being ignored, but it doesn't even seem that the callback is being fired. Placing an echo call in there never appears.

The form I'm using is not using the AJAX method and does use an image upload, in case that affects the solution.

1.5.3

Hi David,

I responded with credentials. It looks like I do have the action firing evidenced by an echo string placed before the return true call. However, the post is still being created.

Baffled here.

Same issue here! Didn't do as much debugging as tobaccordshow but posts get created.
I'm using GF 1.6, just updated to the latest version today.

I am using a GF form for creating and updating "Listings" (a custom post type).
If a user already has a listing the GF gets prefilled with the values from the database and GF should not create a new listing but update the existing one.

Prefill works, listing creation also works, but I can't get gform_disable_post_creation to work.

Code summary: In the page that contains the form and before the form displays, I check for exisiting listings. If we have one we get the prefill and I am using:
`add_filter("gform_disable_post_creation_1", "disable_post_creation", 10, 3);
function disable_post_creation($is_disabled, $form, $entry){
return true;
}`

Is this the right location? Or is anything wrong with the code?