It happened to me under my Lady RV User Name,it also happened to another Admin over the weekend and today I notice a member is mentioning that the wife's User Name won't let her log in. I mention this now because something may be amiss.
I checked three forums I'm a member of (one's my own); none of the forums has a problem such as you mentioned. Your problems may be more so locally, than wide spread.
I do not but will see if I can find it. When I tried to log in it said my password was wrong. I do not remember the exact error msg. Then my other Admin had the same thing happen and Super Admin reset both.