Yeah. I made some other changes to be sure things were taking effect properly. I can adjust the radius or colors for instance. Here is my code and a picture of the result.
colors: ["#edc240", "#afd8f8", "#cb4b4b", "#4da74d", "#9440ed"],
...
points: {
show: true,
fill: true
},
...
also, from jquery.flot.js:
points: {
show: true,
radius: 3,
lineWidth: 2, // in pixels
fill: true,
fillColor: "#ffffff",
symbol: "circle" // or callback
},

See how all of them are filled with white? (#ffffff).
The API says this about fill coloring for points:
- fill {Boolean|Number}
- If set to
true (the default) then points in this series are filled in with the fillColor if set or the colour of the current series if not. - fillColor {[Color][api-documentation-colours]}
The colour used to fill in series points. Unlike lines.fillColor, this cannot be used to specify a gradient. The default value is white. If not specified, the series colour is used to fill in the point.
So I assumed that if I didn't define a fill color and set fill to false, then the series color would be used. What happens in that case is there is just no fill color, as if fill=transparent. So you see whatever color the background color for the plot is. I tried every variation of parameters I could think of that might be effective, but what I get is either white fill, or no fill at all. never solid.
Also, I'm using version 0.7.
Anyhow, thanks for your help so far. I hope this post provides some useful information about the issue I'm experiencing.