Ah-ha - when I press Tab in Normal mode the Normal tab button 'lights up', but if I then hit the Enter key the text is saved - i.e. the OK button is 'pressed'. Seeing the 'Normal' button 'light up' confused me.
However when I press Tab in HTML mode a tab char would appear to be inserted in the html text - which as you say is pointless. If I switch to Normal there's no evidence of the inserted Tabs, nor when I switch back to HTML. This added to my confusion.
It's OK, now I know to switch to Normal mode, press Tab and Enter to save the edits. Been a while since I needed to edit the HTML code.
BR
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