The other day I was noticing that when I included a list in my blog posts that the bullet image wasn't showing up. So, I started digging through the code a little bit. The first stop was the "View Source" in FireFox. Looking here, the HTML is correct and should show the bullets. This led me to the CSS in the BlogSphere Site Skin document for my website and find the tag for lists, this is all correct also, at least it appears to be correct and that it should work. So now I'm a little stumped, I try and view the little blue dot image that is supposed to be displayed as the list item bullet via the browser, it didn't display properly or at all really. Now I had to go look at the images tab in the BlogSphere Site Skin document, yup the file is there and I could preview it with the built in image preview software of both Windows and Mac. So, just out of curiosity I detached the file, opened it with The Gimp, saved it and re-attached it in the Site Skin. Voila', the bullets now show up.
Now what caused this is beyond me, but if you're experiencing the same type of issue you may want to go about the same process.