The reason this is happening is because the image is floating which means that the image is actually covering the bullet points but pushing the UL to the right. So it wouldn't matter how much margin you put on the image because it is floated and the bullets will always stay behind the image in this case. By increasing the padding of the UL you will force the bullets to be visible. Since the image is 200 px wide you will need at least that much before you even start to see the bullets. I found 249px to be just right.
The following is from line 15 in typography.css
ul.bullet-1, ul.bullet-2, ul.bullet-3, ul.bullet-4 {
padding:0 0 0 249px;
}
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Since this will effect all UL, you will probably want to create a special class for them and use it on this particular list. I think there might be other ways to fix this but this is what I would do.
Hope this helps.