I believe that I have correctly used the HTML tags, so I don't know what could be causing this. I don't know the extent of this bug, such as whether it affects some other forums, or if it's only posts from before the update that are affected, so some testing may be needed.
Here is a post with the apostrophe Â' bug.
Here is the one with the no image bug.
I hope a fix is found soon, because this may have corrupted a lot of posts from the past.