I've run into a weird issue where the Blockquote image is not displaying in my Page posts if it is the first thing after an image with a caption positioned left or right. I'm sure there could me other variables to making this happen, but right now this is my need. :-)
Basically, if I don't have something between the CAPTION and BLOCKQUOTE tag, it won't display the image. I know it's there, because I can right-click and View Background Image just fine. Let me know if you need more detail.