I have noticed a really annoying bug on the forum. I am the kind of guy that takes time writing a post.
After a certain amount of time the session of the user is destroyed if there is no activity (thanks god the backup mechanism works).
However the system doesn't understand that "typing" is part of the activity.
So if I don't navigate and if am writing a post for a long while, the system destroys my session without considering that I am still there typing.
As a consequence, when you click on "Post reply", an errors messages appears saying that I am not logged in or the a human verification is needed.
The auto backup is very handy but you may have lost a few lines or corrections in between and of course I have to re-login before to access the backup.
Hope this help.