That did the trick, all right. I'm able to capture my peak traffic again, with the Color[_] target defined or not. Thanks very much! That will make my boss much happier.
I particularly like the overlay clock on the mouse pointer, btw. I keep all of my graphs in GMT, as I am monitoring a number of locations, so being able to see the local timezone as well is pretty darn cool. Usually by traffic patterns, it's easy to tell when daylight hours start in an international office, but this is better.
Thanks again!