i have now learned that when you edit the _first_ post in a topic, you can edit the subject. but i reckon it's more intuitive if it is amongst the other topic management links, like delete, at the bottom.
i attached a patch to tackle that issue. but since this is the first time with oxwall, you probably won't like how the URL for the edit-link is constructed. feel free to include an improved version. :)
cheers,