I just registered to the forum (I was able to verify my email address and log in). Next, I checked the Account Settings, where I wanted to change two options. The system prompted me to reenter my password to do so, and (rather unsurprisingly) I put in the same password that I just used to log in (successfully).
To my amazement, it didn't work. Having logged out to try logging in again, the login gate accepted my password right away. The field in Account Settings, however, still didn't.
I have 8 different special characters in my password, so I figured out I would try converting (some of) them to HTML encoding, which I did twice (first using entities, and then tags), but neither worked.
What's going on, is that a flaw in the forum system?