Thanks for the debug info, I'll definitely bear that in mind.
I have another issue now related to the styles:
Use this test link:
If you select the heading text and try to change the style, it applies the new style as well as keeping the old one.... and this can be done a number of times. Thats why I've added a 'No Style' button to the iRite panel as you need to completely erase all styles before changing to a different one...
... but surely it should be able to just replace the old style with the new one?
Can you help again please, many thanks