Redisplaying characters in a form error

I coded a form that redisplays what the user inputted if there has been an error (ex. leaving a required field blank). but when the user enters quotes when it gets redisplayed it shows some triangles with question marks. �com� what is causing it and how can i fix it?

im using

<meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />