I asked a question recently in the MySQL forum and when i look at my thread in the watched articles page, it says it has been marked solved even though i didn't mark it solved nor does the buttons on the thread indicate that it has been marked solved.
A moderator has the ability to mark a thread solved. Maybe someone else solved/unsolved it?? I'm not sure ... never experienced any type of bug related to this before. You would need to point me to a live thread where one page says it's solved and another page says it's not.