Hi martinoleary,
Can you reproduce this issue on our demo http://phphtmledit.com/EnableAll.php?
If it works for you, please download the latest version and try again.
Latest version download: http://phphtmledit.com/download/phphtmledit.zip
If you still get the same issue, please send the test page url to Kenneth@CuteSoft.net, I will check it and get back to you as soon as possible.
Regards,
ken