When I first saw a screenshot of the '97 Jabba I thought "Bless, some little kid has made a Jabba The Hutt out of plasticine and sent in a photo". Honestly, I did not expect to see something so awful with ILM's name on it. Simply atrocious and embarrassing.
They redid it for the DVD. It looks better. But the blocking is still painful to watch, with Han's arm occupying the same space as Jabba in certain frames. And I agree: Han stepping on Jabba's tail. No, no and, er, no.
I am not anti-CGI by any means. But what does it say when the rubber puppet in ROTJ still looks more convincing than the CGI versions in ANH and TPM?