on the quest screen... there's a load of text that ends with "as you head towards the shield, you realise you are not alone"
and then you get a yes/no question.
thing is.. eh.. there's no question. presumably and intuitively yes means fight or whatever to get the shield and no = leave.... but it should really say it.
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incidentally, in the city details screen.. bottom left bit where all buildings are listed.. in 1280x800, the scroll bar doesn't quite overlap with the text (or overlaps slightly)... could do with shifting the numbers to the left a bit.