Cheers hyper123.
Deactivated all plugins and it appears fine now.
Gonna activate a plugin one at a time now so I can figure which one is being troublesome.
.. a-ha, I believe it was TinyMCE Advanced by Andrew Ozz that was causing the problems. I have an older version (v2.2) – although it’s now at version 3.0, don’t think I’ll bother updating it.
Thanks again!