Thanks. You're right I'm using 1.2.5 and I need to upgrade, I've been putting it off because I've written a mod to use Typekey usernames and haven't had time to look through the latest version to see whether stuff needs to be changed.

Whenever someone uses the code BB syntax on my PunBB forum, they get this message

The BBCode syntax in the message is incorrect. Missing end tag for code.

and believe me the syntax is correct. Does anyone know why this is happening?