Buggy quests, Frog and Griffen

[akn]

I bought it over Steam. Had the steam patch problem before (crash to desktop when going to the island), the new (old) patch fixed that but now I can't complete these quests.
Might be more quest broken, I know one with a pirate inside a castle in a mine, which I attacked and he is still there and it seem I can attack him again. Good exp and gold, but still an exploite.