Bug when editing a message
When I post a message in the lessons forum, and when I edit it, I have sometimes to edit 2 or 3 times, before my edit is saved. Why this bug? Some people have the same? Most of the time it doesn't save my edit, and keep the previous version of my message.
Chances are your edit went through and all you have to do is refresh the page one or two times. However, for safety, you should copy and paste your thread's contents before you save your edit because there is a slight chance that it did not go through at all.
I faced a similar thing a few times. Only I did not have to re-edit my posts, the edited versions appeared after some time.
Edit: The post count (the number of post in a thread in the oval callout to the right from the thread title) almost never shows the correct number though. I got used to not pay attention, but if there is a way to make that thing work properly, that would be good.
Edit #2: The edit above showed only after I went out of this thread and then returned back in.