Okay, that's strange....

It was fine a couple of days ago at my end, but when I click onto the 'tree' icon now, I'm still getting the entry field options saying 'Insert/edit image' at the top, right down to the 'Horizontal space' option....but there is now no sign of the buttons that were below that in the box.

I can't remember what the button actually said that was on the very bottom-left of the box, but I know I had click on it before whatever code I'd typed into the 'Image URL' field would then show as an image in my reply box....

Any ideas on why this vital tab seems to be missing now when I click on the 'tree' icon? Thanks.