How has Jim changed after being captured?

I really don't think that Jim changes too much. He is happy to see Huck and shows him no malice over what happened. If anything, he doesn't see the use in a risky rescue. Although sad for being locked up and missing his family, Jim shows no sense of bitterness or vengeance that one would expect. I suppose this is why Jim is the most sympathetic character in Twain's classic.