I just did 113 screen caps from 4-6 and I noticed a few things. The caps I took are from the DVD's, the new ones, so they would be the SE.
IN 4, as Fett is turning around to leave with Jabba, he has no skull on his shoulder bell.
Also, during the "he's no good to me dead" scene, Fett's armor lights are not moving, i.e.; no sequence. They are not moving. Not sure if you can tell this form the pics, but if you watch it, you will see what I mean:
Also, I will be uploading these images tonight. The size (widescreen version) for each image is 1280x1024. I will make a page for them, etc.