yup I see it, that's wasn't the purpose of the comment.
auto collapse iconic panels should not close when using the panel, for
example when using the Hue/Saturation panel, if you try to use the eyedropper
it closes the panel.
I don't mind the auto collapse iconic panels because it gets me a little closer to the (in my opinion) interface of the adjustment curves in CS3.
The problem that I tried to define ( I may not have done a good job though) was that while using an adjustment layer and the Auto-collapse is enabled it shouldn't collapse. The concept behind Auto-collapse is to keep it expanded and then collapse when you are done, it's close but in the case where you are attempting to sample the image as in HS/ Curves, Levels etc. it will close even though you are using the eyedropper from within the adjustment panel. It makes the Auto-collapse feature unusable and it's a shame because it's not a bad workaround for the new and not so good, interface that CS4 has adopted.
So to your final point, if this feature was fixed it, you would call the adjustment layer from the layers panel as in CS3, mess around with the adjustment layer and click on a new different layer to dismiss the adjustment window, not too different from CS3..... except for my initial feature request to keep it open until I'm done using the layer.