Just followed the step-by-step WP instructions for moving the new site from a dummy domain to my real one. Everything goes well, the site works at the new URL, but the thumbs don't appear in posts. Tried re-linking, as they seem to be in the Media Library but this doesn't work. In the source code I can see the thumbnail references point to the old library, but all of the page images seem to have updated correctly. The help file said to make sure you go to Settings>Media and change the library to the current location, but there is no feature there for that.
Any suggestions?