"....in the USA they intentionally spell words such as labour, harbour, honour, etc. incorrectly by dropping the silent "U". That is their right, I suppose, and I have no objection to that. What does piss me off though is when computer spell-checkers keep underlining these words when I spell them correctly!...."

Agreed, Sandy ~ tho your 'incorrectly' might be queried as a bit if a relativist term here?. And WHY does it do so when one has opted for the UK setting in the computer toolbar-menu? I mean, what is the use of having this option if it doesn't recognise this distinction?

This refers to the  system; is it the same with other computers? And, for info, the word 'recognise' in the last line of previous para has acquired a red line because I didn't type 'recognize' ~~ which I categorically decline to do, Mr Macintosh!}

~Michael~