Not to hijack the thread, but I've had overheating issues lately too..
When I'm on the move, the car is fine, but when I'm stopped, that's when it can overheat (and the temp jumps up pretty quickly)... And it happens randomly too!!
Found a whole lot of shit in the radiator fluid and overflow bottle, so I had the radiator completely flushed and the fluid replaced... Any thoughts??
I'm thinking maybe water pump, hoses or fan.. Anyone have any similar issues that can give some advise/insight??