We were playing Carcassonne last night using the expansions Wheel of Fortune and Abbey & Mayor. A situation came up where a player had his mayor on a large unfinished city with several pennants and the wheel landed on taxes.
When taxes occurs, should the mayor be counted as multiple knights (as many as there are pennants), a single knight, or no knights?
In my interpretation, "when a city containing a mayor is scored (but at no other times, e.g. taxes) the mayor is counted as..." with the (but at no other times) implied would mean that the mayor has no effect during taxes and is treated as though it is not present. However, arguably the taxes is a sort of "scoring the city" (though I see it more as scoring the knights).
In my opponents interpretation, any follower (be it the wagon, mayor, big follower, or ordinary meeple) when played in a city would be considered a knight from then on until removed from the board (or in the case of the mayor as multiple knights).
We allowed the mayor to count as a number of separate knights equal to the number of pennants (banners) in order to let play resume, which caused some very high points. At the time, there were seven banners and only the mayor present in the city in question for a total of 7 knights x (7 banners + 7 knights) = 98 points. The irony I suppose is that although my opponent scored massive points for the first taxes, I turned the tables on him by scoring massive number of points on the next two times taxes came up using the same ruling. Still, 100+ points for taxes while the other wheel of fortune tiles scoring an average of 8 or so points seems absurd.