The first glitch is the worst, it is the Gargoyle leader. When he asked who sent you to him, you are supposed to say valkadesh, but this doesn't work. I even looked in the source code files, and I see clearly that the keyword is valk. The second glitch is Julia will not join the party when you ask her to.
I tried this again, and it still is not letting me surrender to the gargoyle king. I don't know if there is something I forgot to do, but I think I did everything. I got the book, the scroll, both halves of the tablet. I talked to Captain John, and Valkadesh. Any ideas what I might need to do different, or if this might be a glitch?