I'm using a fairly simple child of the TwentyTen theme on my site, and I find when I insert a right-justified image, the text only flows down the left side of the image until the next H2. Then a large vertical space is inserted before the next H2. You can see an example here.
The weird thing is, the Visual post editor displays what I expect: the text continues flowing down the left side of the image with no vertical space. It's only when the post is viewed on the site that it looks ugly.
Anyone have any clue what might be causing this?