I don't have any actions on slide enter for the entire course. I did try playing around with different skins and found that nothing changed, unless I removed the playback color (customer's corporate color). While the playbar(CoolBlue) did not disappear on the slides, as before, the far right end of the playbar was white. Here are some screen grabs.
This is what it should look like
This is what happens on TWO slides
And here is what happens when I removed the custom color on those two slides.
Thanks for any help you can provide.