The problem happens for all instances of the editor, not just text/html modules. That particular screengrab was from the announcements module. I could have grabbed it from any module.

And... the screengrab shows a different skin on the toolbar, but it makes no difference what skin is used, the problem happens regardless of the skin. It firest happened long before I ever tried a different skin.

Hi, thanks for continuing to look at this.

Yes you are of course correct that the buttons are normally there. I always hide them by adding runat="server" visible="false" to the table row they they are in.

After reading your post I went back and made them visible to see if I could switch back to the rich text editor and yes, I was able to... hurrah! Thankfully now I won't have to delete the user to restore the editor - I should have checked this before :)

So, that changes my problem to this:

What causes the editor to switch to plain text, for one user, without user-interaction? And is there a way to ensure that it never changes?

Thanks very much for the replies,
Rob