Covers missing from printouts after transfer to new Mac

Recently upgraded to a new Mac. Both computers running Core 2 Duo processors, Mac OS X 10.6.2 and Delicious Library 2.3.3. Copied ~/Library/AppSuppt/Delicious Library folder to new machine. Library seems to work fine: covers all appear in shelves, and covers show up if I choose File > Publish to Folder. However, when I choose Print (style: collection overview), the covers do NOT show up. (Only the text.) There is a blue square with a question mark in the middle where the cover art should be. (For what it's worth, switching the Style pop-up to Details caused Library and Print dialog to become unresponsive. Had to force-quit after waiting a minute or two.)

How can I get the covers to appear in printouts? This was not a problem on older machine. Is there a way to "rebuild" the Delicious Library data file?