This could be classed as a bug or a suggestion but when in a category, clicking the Mark Forums Read button only has the option for all forums.
See here for an example: http://xenforo.com/community/categories/resource-and-add-on-releases.71/
Ideally it should also give the option for the child forums.
See here for an example: http://xenforo.com/community/categories/resource-and-add-on-releases.71/
Ideally it should also give the option for the child forums.