It's a common complaint, but the Zetec's do seem to run hot. As long as it stays in the normal range, it's not anything to worry about.
However, it is a possibility that the transmission is the source of the added heat. It could be the cooler is at a reduced capacity and the extra heat is bleeding into the block. This would only be true if you have an auto tranny. You may want to look into it -- the radiator is used to cool the tranny fluid and is unique to the automatic equipped cars. Manuals have different radiators.
-Lance
