Hi.

Though you solved it by restarting your terminal program:
That looks like something binary was cat'ed to the terminal, switching fonts by control characters being sent to the terminal. If that was the case, sending the following character sequence might help (or could have helped):
"echo "+CTRL-V+CTRL-O
That is sending the literal string "echo" followed by a space character, the CTRL-V control code and the CTRL-O control code.
By the way, I think CTRL-V CTRL-N is the combination switching to the garbled font. (Just verified this, yes, I'm right.)
You could leave out the "echo " part, if you don't mind your shell complaining about an unknown command/nonexistant file.

cu,
sven

proud MkII owner (12GB blue/green/smoked, #080000113)