This one is really throwing me for a loop.
Paste the data below on a blank sheet, and select it.
This, of course, has to be done with Excel 2007.
Use the ribbon to insert an XY scatter chart with straight lines
connecting the points.
What I get is a chart without any visible data series.
When I delete the pair of zeros in the 4th line from the bottom,
suddenly the two data series appear.
Or changing the chart type to "smooth lines" makes them appear.
I would appreciate it if someone could confirm what I'm getting.
This had me going until nearly 1 am last night.

Thanks,

Brian

0 0 0
0 0.5 -0.5
2 0.5 -0.5
2 0 0
0 0 0

2 0 0
2 0.5 -0.5
3 0.5 -0.5
3 0 0
2 0 0

4 0 0
4 0 0
0 0
0 0
4 0 0