*EDIT*MORE INFO*
So, I kept Klint with me and left Sulik at the courtyard gates. When I came back, I told Vic to wait, and I initiated dialogue with Sulik. Instead of the normal, "Let's go" speech options, Sulik acts like this is the first time we've ever met! ...
But then, remember this from page 48?
"2) I was exiting Hakunin's tent just as Klint was entering, and we stopped each other in the doorway. But Klint stopped in a running pose. I was able to move him and continue on just fine. But, from then on, Klint displayed no "standing-at-ease" pose. He would just stop moving but still display one of his in-motion poses. Then, if I entered combat, Klint's first move would be to fall down, complete with thud and oof sounds. After that initial fall, he would be fine. And after exiting combat, no recurring problem at all."
After joining my party again, SULIK started this same never-at-rest behavior. When we left the V.C. map and had a random desert battle encounter Sulik's first move is to fall down. After that, everything's fine.
So, it seems like Klint and Sulik (who are really the same critter, right?) both had glitches in the same area. What do you make of it, MIB?