Some nodes not recognized by Drupal after site move!

Well, I recently moved a Drupal6 site to a new server. Everything looked ok, so at this point it is live. However, upon using the site for a week+, I'm noticing that a handful of nodes do not seem to be recognized. They still exist in the database, but are not displayed in the various views where they should be (i.e. calendar,news,etc.). I can't find any rhyme or reason, and no commonalities among the mystery nodes. Any ideas what could cause--or better, what could resolve--this?

Any suggestions would be appreciated.
Joy