Node Teaser (somewhat) fixed in drupal 6!

My largest code contribution to Drupal core just got committed! :) At last node_teaser() can take a rest -- at least for a while anyway. It looks like there'll be another round of work on it for Drupal 7).

This was partially sponsored by CivicActions and was a result of work on Massive kudos to Giles for his extensive testing on this.