This is a crazy error. For some reason, whenever I try to type unicode characters, such as the ever-popular ♥, ♪ and ♫, they show up as "?" on my screen. Other people are able to see them, at least I assume so based on the number of people who ask me "How do you do that?"
The big font, what shows up when you frag people or start a game, is also mis-sized. It's always the same size, no matter the length of the message. So "Deathmatch Started!" would be the same font size as "You Killed ,.~'|G.0.T.H.D.A.T|'~.,", despite the difference in the number of characters. I suspect these two problems are related.
I've determined this is not a problem with my font.ini file, it occurs with the default file and my tweaked file.
Also, I was able to see unicode characters in 1.4.