I'm trying to paste in "Hello World!" into the text circle field, but it's giving me a bunch of arrows. 
The font in that input field updates with the font you set under Text Settings > Font. My guess is the font you're using replaces the normal alphanumeric characters? Do you mind sending me a link to the font you're using? If your font isn't the cause, does the same thing happen when you just type into the field, rather than paste?