I have had this glitch ever since v13. Whenever text is centerprinted, bottomprinted, or chatmessage'd, if it is above (I THINK) size 12 (it could be 10 or 14) only the last solid character is said. (this is on Macintosh systems only I believe, I'm running OSX Lion).
For example, the sentance "Dis glitch gon b gud." on a size 18 centerprint would only show "gud."
As "I wwant admin !" would only show "!"