Gil beat me to it. Superstar effects that bunch up on the edge of the model are usually GALAXY effects. They are handled differently in Superstar. My advice (after converting about 20 Superstar sequences so far) is to replace them with morphs.
The Superstar conversions in .46 are the best they've been so far. I'd say 95% accurate.
One thing to note, if you click on a picture effect where the new shimmer option is selected, and then click on another picture effect, it will automatically check the shimmer effect on the second picture effect as well. Just uncheck it.
The other issue you will notice on some sequences is the layer order of effects may be different from the original Superstar sequence. Just select the effect you need to move and use the up/down arrows to move it higher or lower in the layer order.
I REALLY appreciate the work Gil put in on this release to make these conversions so much more accurate!!!