For the question mark, I got it with the "degree" symbol too, that's why I put the " * " instead. It isn't the computer's fault. It's from the forum software, because it changes between the typing (this is Ok in the window) and the final display on the forum's page. If you want to edit it, all you get back is the "?". The right info is lost. Correct it, ok on the window, but same thing happens again.
For me, I guess that comes from a change of the text police in the library of the forum's software (during an update), the root part holding the forum. Maybe even Butch can't have access to that.