I guess we could run htmlspecialchars_uni() on the forum title, but then we would lose the hidden functionality of HTML in the forum title. Or I guess we could just run the "&" portion of htmlspecialchars_uni...
I'm considering this a feature suggestion for a future version.
But what can I do? If I write "&", it is right in the frontend, but in the ACP, the title has a "&" instead of the &.
Probably should fix that in the AdminCP.
You can also try the other version of &
& #038;
(remove the space between the above; MyBB seems to be doing weird things with it
)
I resorted to "and" when I had this problem.