Should be right alpha, but it doesn't look like it

I use Keylight on some footage in AE CS4 and then put in PPro CS3 for the rest of the editing process.  In AE, one of my roses (a lamp we chose to accentuate what's happening) looks like this:

alpha-in-ae.jpg

I have "Unpremultiply" checked in Keylight, and here is my output for rendering Module settings:

alpha-settings.jpg

As far as I know, I should just finish with sequences with straight alpha, but in the body, I get the famous "premultiplied alpha halo" anyway!  Initially, the halo was only a second or two after that I would click in a new spot on the timeline - that really caught my attention it was something other than just a bad seizure on my part.  I actually tried to catch a screenshot for this moment before the halo would appear (to show the before - after), but at the time that that I decided to try this, Murphy's law struck at-now there is no delay and it looks like that all the time:

alpha-in-ppro.jpg

I have several roses I've handled in the same way, and they have all the halo, but it is of course not obvious if not the rose itself or background images is darker.

I'm pretty new to typo and alpha, but I thought that I had done my homework, so to speak.  What else should I check?

Try to make RGB and Alpha separately, then use the first Alpha key effect to recombine. When you do so, consider dilate by one pixel RGB data using the Minimax effect.

Mylenium

Tags: After Effects

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