I saw this tour earlier in Providence. Jaco was not manic at all, just what we assumed was his usual amazing self. I was pretty disappointed with the Shadows and Light album and video as it sounded all coked up to me compared to the show I saw which was much gentler and more focused on Joni. Different vibe altogether. However, I've grown to really love the album and DVD since then.
I also saw Jaco about 14 months before that with Weather Report in 1978. He was amazing and there was no sign of the impending madness.