Do you have a description how to insert images into a post ?
I have seen this in some answers and there is a button in the editor.
But I can not get this to work.
Sometimes this would help a lot when describing a problem.
Is this feature not available for standard users?

Another forum related question:

I know that I can watch a specific topic
and get notification by email.

Is there a way to watch a complete forum ?

There are several known (by developers) errors with this forum. Unfortunately I have no time to improve it, so I just waiting for new version of YAF will be released.
Regarding to forum changes subscribing: in the bottom of every forum you can see and use such links

For subscribing to full site changes (with complete list of forums) you can choose this (bottom-right of the Home page):