Thanks Ray.
It probably was when setting up the rules for the html editor; it happened a few times, but since saving the editor as a preset, it hasn't happened since.
helpergroupsrules file attached.
Cheers
Chris
Your friends over here at WebAssist! These Dreamweaver extensions will assist you in building unlimited, custom websites.
These out-of-the-box solutions provide you proven, tested applications that can be up and running now. Build a store, a gallery, or a web-based email solution.