The graph behavior was changed in SR2 so that it opens to show the entire key range instead of just the first 30 frames. Seems that was too eager as it also seems to display the entire *possible* range. Fortunately there were other changes. There's a button in the bottom left of the graph to reset the display range. This only seems to happen when the graph is opened from the Parameter Palette context menu. Opening the graph from the top menu or the button on the animation palette opens it normally.